Search a number
-
+
199999406 = 299999703
BaseRepresentation
bin10111110101110…
…11111110101110
3111221100000121102
423322323332232
5402144440111
631502403102
74645652435
oct1372737656
9457300542
10199999406
11a2992572
1256b90492
1332586c59
141c7c211c
151285913b
hexbebbfae

199999406 has 4 divisors (see below), whose sum is σ = 299999112. Its totient is φ = 99999702.

The previous prime is 199999391. The next prime is 199999409. The reversal of 199999406 is 604999991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604999991 = 5939101869.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999850 + ... + 49999853.

It is an arithmetic number, because the mean of its divisors is an integer number (74999778).

Almost surely, 2199999406 is an apocalyptic number.

199999406 is a deficient number, since it is larger than the sum of its proper divisors (99999706).

199999406 is an equidigital number, since it uses as much as digits as its factorization.

199999406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99999705.

The product of its (nonzero) digits is 1417176, while the sum is 56.

The square root of 199999406 is about 14142.1146226440. The cubic root of 199999406 is about 584.8029686865.

The spelling of 199999406 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred six".

Divisors: 1 2 99999703 199999406