137605907 has 4 divisors (see below), whose sum is σ = 137728920. Its totient is φ = 137482896.

The previous prime is 137605903. The next prime is 137605927. The reversal of 137605907 is 709506731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709506731 = 1709 ⋅415159.

It is a cyclic number.

It is not a de Polignac number, because 137605907 - 2² = 137605903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137605903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59813 + ... + 62070.

It is an arithmetic number, because the mean of its divisors is an integer number (34432230).

Almost surely, 2^137605907 is an apocalyptic number.

137605907 is a deficient number, since it is larger than the sum of its proper divisors (123013).

137605907 is a wasteful number, since it uses less digits than its factorization.

137605907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123012.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 137605907 is about 11730.5544199752. The cubic root of 137605907 is about 516.2725397081.

The spelling of 137605907 in words is "one hundred thirty-seven million, six hundred five thousand, nine hundred seven".