137508865 has 16 divisors (see below), whose sum is σ = 183834000. Its totient is φ = 98042112.

The previous prime is 137508863. The next prime is 137508893. The reversal of 137508865 is 568805731.

It can be written as a sum of positive squares in 8 ways, for example, as 1739761 + 135769104 = 1319^2 + 11652^2 .

It is a cyclic number.

It is not a de Polignac number, because 137508865 - 2¹ = 137508863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137508863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34590 + ... + 38359.

It is an arithmetic number, because the mean of its divisors is an integer number (11489625).

Almost surely, 2^137508865 is an apocalyptic number.

It is an amenable number.

137508865 is a deficient number, since it is larger than the sum of its proper divisors (46325135).

137508865 is a wasteful number, since it uses less digits than its factorization.

137508865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72996.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 137508865 is about 11726.4173983361. The cubic root of 137508865 is about 516.1511498089.

The spelling of 137508865 in words is "one hundred thirty-seven million, five hundred eight thousand, eight hundred sixty-five".