131191913 has 8 divisors (see below), whose sum is σ = 132061440. Its totient is φ = 130325760.

The previous prime is 131191901. The next prime is 131191937. The reversal of 131191913 is 319191131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131191913 - 2⁴ = 131191897 is a prime.

It is a super-2 number, since 2×131191913² = 34422636073199138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131191013) 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, 155948 + ... + 156786.

It is an arithmetic number, because the mean of its divisors is an integer number (16507680).

Almost surely, 2^131191913 is an apocalyptic number.

It is an amenable number.

131191913 is a deficient number, since it is larger than the sum of its proper divisors (869527).

131191913 is an equidigital number, since it uses as much as digits as its factorization.

131191913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its digits is 729, while the sum is 29.

The square root of 131191913 is about 11453.9038323185. The cubic root of 131191913 is about 508.1231966589.

The spelling of 131191913 in words is "one hundred thirty-one million, one hundred ninety-one thousand, nine hundred thirteen".