131636913 has 4 divisors (see below), whose sum is σ = 175515888. Its totient is φ = 87757940.

The previous prime is 131636909. The next prime is 131636927. The reversal of 131636913 is 319636131.

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 131636913 - 2² = 131636909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131636903) 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, 21939483 + ... + 21939488.

It is an arithmetic number, because the mean of its divisors is an integer number (43878972).

Almost surely, 2^131636913 is an apocalyptic number.

It is an amenable number.

131636913 is a deficient number, since it is larger than the sum of its proper divisors (43878975).

131636913 is an equidigital number, since it uses as much as digits as its factorization.

131636913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43878974.

The product of its digits is 8748, while the sum is 33.

The square root of 131636913 is about 11473.3130786186. The cubic root of 131636913 is about 508.6970624286.

The spelling of 131636913 in words is "one hundred thirty-one million, six hundred thirty-six thousand, nine hundred thirteen".