136131871 has 4 divisors (see below), whose sum is σ = 142050672. Its totient is φ = 130213072.

The previous prime is 136131857. The next prime is 136131883. The reversal of 136131871 is 178131631.

136131871 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.

It is a cyclic number.

It is not a de Polignac number, because 136131871 - 2¹¹ = 136129823 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 (136131811) 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, 2959366 + ... + 2959411.

It is an arithmetic number, because the mean of its divisors is an integer number (35512668).

Almost surely, 2^136131871 is an apocalyptic number.

136131871 is a deficient number, since it is larger than the sum of its proper divisors (5918801).

136131871 is an equidigital number, since it uses as much as digits as its factorization.

136131871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918800.

The product of its digits is 3024, while the sum is 31.

The square root of 136131871 is about 11667.5563422681. The cubic root of 136131871 is about 514.4224788862.

The spelling of 136131871 in words is "one hundred thirty-six million, one hundred thirty-one thousand, eight hundred seventy-one".