136257313 has 4 divisors (see below), whose sum is σ = 142181568. Its totient is φ = 130333060.

The previous prime is 136257311. The next prime is 136257389. The reversal of 136257313 is 313752631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313752631 = 1699 ⋅184669.

It is a cyclic number.

It is not a de Polignac number, because 136257313 - 2¹ = 136257311 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136257311) 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, 2962093 + ... + 2962138.

It is an arithmetic number, because the mean of its divisors is an integer number (35545392).

Almost surely, 2^136257313 is an apocalyptic number.

It is an amenable number.

136257313 is a deficient number, since it is larger than the sum of its proper divisors (5924255).

136257313 is an equidigital number, since it uses as much as digits as its factorization.

136257313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5924254.

The product of its digits is 11340, while the sum is 31.

The square root of 136257313 is about 11672.9307802282. The cubic root of 136257313 is about 514.5804393826.

The spelling of 136257313 in words is "one hundred thirty-six million, two hundred fifty-seven thousand, three hundred thirteen".