137405665 has 8 divisors (see below), whose sum is σ = 165515328. Its totient is φ = 109505520.

The previous prime is 137405659. The next prime is 137405669. The reversal of 137405665 is 566504731.

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

It is not a de Polignac number, because 137405665 - 2⁷ = 137405537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137405669) 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, 50931 + ... + 53560.

It is an arithmetic number, because the mean of its divisors is an integer number (20689416).

Almost surely, 2^137405665 is an apocalyptic number.

It is an amenable number.

137405665 is a deficient number, since it is larger than the sum of its proper divisors (28109663).

137405665 is a wasteful number, since it uses less digits than its factorization.

137405665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104759.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 137405665 is about 11722.0162514817. The cubic root of 137405665 is about 516.0219941850.

The spelling of 137405665 in words is "one hundred thirty-seven million, four hundred five thousand, six hundred sixty-five".