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199289689 = 1927432
BaseRepresentation
bin10111110000011…
…10101101011001
3111212222222001121
423320032231121
5402004232224
631435245241
74636635334
oct1370165531
9455888047
10199289689
11a2548325
12568a9821
1332398bc1
141c67961b
1512768be4
hexbe0eb59

199289689 has 9 divisors (see below), whose sum is σ = 210614133. Its totient is φ = 188546652.

The previous prime is 199289683. The next prime is 199289737. The reversal of 199289689 is 986982991.

The square root of 199289689 is 14117.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 199289689 - 23 = 199289681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199289681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 267852 + ... + 268594.

Almost surely, 2199289689 is an apocalyptic number.

199289689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

199289689 is the 14117-th square number.

199289689 is the 7059-th centered octagonal number.

It is an amenable number.

199289689 is a deficient number, since it is larger than the sum of its proper divisors (11324444).

199289689 is an frugal number, since it uses more digits than its factorization.

199289689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 762 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 61.

The cubic root of 199289689 is about 584.1104057621.

The spelling of 199289689 in words is "one hundred ninety-nine million, two hundred eighty-nine thousand, six hundred eighty-nine".

Divisors: 1 19 361 743 14117 268223 552049 10488931 199289689