137604523 has 4 divisors (see below), whose sum is σ = 157262320. Its totient is φ = 117946728.

The previous prime is 137604499. The next prime is 137604527. The reversal of 137604523 is 325406731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325406731 = 13 ⋅25031287.

It is a cyclic number.

It is not a de Polignac number, because 137604523 - 2¹³ = 137596331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137604527) 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, 9828888 + ... + 9828901.

It is an arithmetic number, because the mean of its divisors is an integer number (39315580).

Almost surely, 2^137604523 is an apocalyptic number.

137604523 is a deficient number, since it is larger than the sum of its proper divisors (19657797).

137604523 is an equidigital number, since it uses as much as digits as its factorization.

137604523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19657796.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 137604523 is about 11730.4954285827. The cubic root of 137604523 is about 516.2708088629.

The spelling of 137604523 in words is "one hundred thirty-seven million, six hundred four thousand, five hundred twenty-three".