136461813 has 4 divisors (see below), whose sum is σ = 181949088. Its totient is φ = 90974540.

The previous prime is 136461797. The next prime is 136461823. The reversal of 136461813 is 318164631.

136461813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 136461813 - 2⁴ = 136461797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136461823) 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, 22743633 + ... + 22743638.

It is an arithmetic number, because the mean of its divisors is an integer number (45487272).

Almost surely, 2^136461813 is an apocalyptic number.

It is an amenable number.

136461813 is a deficient number, since it is larger than the sum of its proper divisors (45487275).

136461813 is an equidigital number, since it uses as much as digits as its factorization.

136461813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45487274.

The product of its digits is 10368, while the sum is 33.

The square root of 136461813 is about 11681.6870785003. The cubic root of 136461813 is about 514.8377444676.

It can be divided in two parts, 1364618 and 13, that added together give a palindrome (1364631).

The spelling of 136461813 in words is "one hundred thirty-six million, four hundred sixty-one thousand, eight hundred thirteen".