137535523 has 4 divisors (see below), whose sum is σ = 139588360. Its totient is φ = 135482688.

The previous prime is 137535511. The next prime is 137535557. The reversal of 137535523 is 325535731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325535731 = 37 ⋅8798263.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137535523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137535323) 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, 1026318 + ... + 1026451.

It is an arithmetic number, because the mean of its divisors is an integer number (34897090).

Almost surely, 2^137535523 is an apocalyptic number.

137535523 is a deficient number, since it is larger than the sum of its proper divisors (2052837).

137535523 is an equidigital number, since it uses as much as digits as its factorization.

137535523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052836.

The product of its digits is 47250, while the sum is 34.

The square root of 137535523 is about 11727.5540075499. The cubic root of 137535523 is about 516.1845020059.

The spelling of 137535523 in words is "one hundred thirty-seven million, five hundred thirty-five thousand, five hundred twenty-three".