136537523 has 4 divisors (see below), whose sum is σ = 144569160. Its totient is φ = 128505888.

The previous prime is 136537507. The next prime is 136537529. The reversal of 136537523 is 325735631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136537523 - 2⁴ = 136537507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136537529) 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, 4015793 + ... + 4015826.

It is an arithmetic number, because the mean of its divisors is an integer number (36142290).

Almost surely, 2^136537523 is an apocalyptic number.

136537523 is a deficient number, since it is larger than the sum of its proper divisors (8031637).

136537523 is an equidigital number, since it uses as much as digits as its factorization.

136537523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031636.

The product of its digits is 56700, while the sum is 35.

The square root of 136537523 is about 11684.9271713605. The cubic root of 136537523 is about 514.9329387653.

The spelling of 136537523 in words is "one hundred thirty-six million, five hundred thirty-seven thousand, five hundred twenty-three".