137999565 has 128 divisors (see below), whose sum is σ = 289843200. Its totient is φ = 61585920.

The previous prime is 137999539. The next prime is 137999579. The reversal of 137999565 is 565999731.

137999565 is a `hidden beast` number, since 1 + 3 + 79 + 9 + 9 + 565 = 666.

137999565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 137999565 - 2⁶ = 137999501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1890369 + ... + 1890441.

It is an arithmetic number, because the mean of its divisors is an integer number (2264400).

Almost surely, 2^137999565 is an apocalyptic number.

137999565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

137999565 is an abundant number, since it is smaller than the sum of its proper divisors (151843635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137999565 is a wasteful number, since it uses less digits than its factorization.

137999565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its digits is 2296350, while the sum is 54.

The square root of 137999565 is about 11747.3216096266. The cubic root of 137999565 is about 516.7643822582.

The spelling of 137999565 in words is "one hundred thirty-seven million, nine hundred ninety-nine thousand, five hundred sixty-five".