137007404521 has 4 divisors (see below), whose sum is σ = 147546435652. Its totient is φ = 126468373392.

The previous prime is 137007404507. The next prime is 137007404537. The reversal of 137007404521 is 125404700731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125404700731 = 73951 ⋅1695781.

It can be written as a sum of positive squares in 2 ways, for example, as 16278952921 + 120728451600 = 127589^2 + 347460^2 .

It is a cyclic number.

It is not a de Polignac number, because 137007404521 - 2⁷ = 137007404393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137007504521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5269515546 + ... + 5269515571.

It is an arithmetic number, because the mean of its divisors is an integer number (36886608913).

Almost surely, 2^137007404521 is an apocalyptic number.

It is an amenable number.

137007404521 is a deficient number, since it is larger than the sum of its proper divisors (10539031131).

137007404521 is a wasteful number, since it uses less digits than its factorization.

137007404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539031130.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 137007404521 in words is "one hundred thirty-seven billion, seven million, four hundred four thousand, five hundred twenty-one".