137660725 has 6 divisors (see below), whose sum is σ = 170699330. Its totient is φ = 110128560.

The previous prime is 137660711. The next prime is 137660753. The reversal of 137660725 is 527066731.

It can be written as a sum of positive squares in 3 ways, for example, as 24940036 + 112720689 = 4994^2 + 10617^2 .

It is not a de Polignac number, because 137660725 - 2⁷ = 137660597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2753190 + ... + 2753239.

Almost surely, 2^137660725 is an apocalyptic number.

It is an amenable number.

137660725 is a deficient number, since it is larger than the sum of its proper divisors (33038605).

137660725 is an equidigital number, since it uses as much as digits as its factorization.

137660725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506439 (or 5506434 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 137660725 is about 11732.8907350235. The cubic root of 137660725 is about 516.3410863557.

The spelling of 137660725 in words is "one hundred thirty-seven million, six hundred sixty thousand, seven hundred twenty-five".