136812311 has 8 divisors (see below), whose sum is σ = 145366560. Its totient is φ = 128759904.

The previous prime is 136812287. The next prime is 136812317. The reversal of 136812311 is 113218631.

136812311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-136812311 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 (136812317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9011 + ... + 18836.

It is an arithmetic number, because the mean of its divisors is an integer number (18170820).

Almost surely, 2^136812311 is an apocalyptic number.

136812311 is a deficient number, since it is larger than the sum of its proper divisors (8554249).

136812311 is an frugal number, since it uses more digits than its factorization.

136812311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27898 (or 27864 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 136812311 is about 11696.6794860764. The cubic root of 136812311 is about 515.2781493027.

The spelling of 136812311 in words is "one hundred thirty-six million, eight hundred twelve thousand, three hundred eleven".