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199999749 = 3293227531
BaseRepresentation
bin10111110101111…
…00000100000101
3111221100001002010
423322330010011
5402144442444
631502404433
74645653435
oct1372740405
9457301063
10199999749
11a2992854
1256b90719
1332587161
141c7c22c5
15128592b9
hexbebc105

199999749 has 8 divisors (see below), whose sum is σ = 267577632. Its totient is φ = 132877520.

The previous prime is 199999739. The next prime is 199999759. The reversal of 199999749 is 947999991.

199999749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199999739) and next prime (199999759).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199999749 - 213 = 199991557 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199999749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112887 + ... + 114644.

It is an arithmetic number, because the mean of its divisors is an integer number (33447204).

Almost surely, 2199999749 is an apocalyptic number.

It is an amenable number.

199999749 is a deficient number, since it is larger than the sum of its proper divisors (67577883).

199999749 is a wasteful number, since it uses less digits than its factorization.

199999749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227827.

The product of its digits is 14880348, while the sum is 66.

The square root of 199999749 is about 14142.1267495381. The cubic root of 199999749 is about 584.8033029997.

The spelling of 199999749 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred forty-nine".

Divisors: 1 3 293 879 227531 682593 66666583 199999749