137038521 has 4 divisors (see below), whose sum is σ = 182718032. Its totient is φ = 91359012.

The previous prime is 137038493. The next prime is 137038589. The reversal of 137038521 is 125830731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 137038521 - 2¹⁰ = 137037497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137036521) 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, 22839751 + ... + 22839756.

It is an arithmetic number, because the mean of its divisors is an integer number (45679508).

Almost surely, 2^137038521 is an apocalyptic number.

It is an amenable number.

137038521 is a deficient number, since it is larger than the sum of its proper divisors (45679511).

137038521 is an equidigital number, since it uses as much as digits as its factorization.

137038521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45679510.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 137038521 is about 11706.3453306316. The cubic root of 137038521 is about 515.5619855702.

The spelling of 137038521 in words is "one hundred thirty-seven million, thirty-eight thousand, five hundred twenty-one".