136856813 has 16 divisors (see below), whose sum is σ = 143208000. Its totient is φ = 130703232.

The previous prime is 136856807. The next prime is 136856843. The reversal of 136856813 is 318658631.

It is a cyclic number.

It is not a de Polignac number, because 136856813 - 2¹² = 136852717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136856843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351623 + ... + 352011.

It is an arithmetic number, because the mean of its divisors is an integer number (8950500).

Almost surely, 2^136856813 is an apocalyptic number.

It is an amenable number.

136856813 is a deficient number, since it is larger than the sum of its proper divisors (6351187).

136856813 is an equidigital number, since it uses as much as digits as its factorization.

136856813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its digits is 103680, while the sum is 41.

The square root of 136856813 is about 11698.5816661679. The cubic root of 136856813 is about 515.3340127509.

The spelling of 136856813 in words is "one hundred thirty-six million, eight hundred fifty-six thousand, eight hundred thirteen".