113891131 has 2 divisors, whose sum is σ = 113891132. Its totient is φ = 113891130.

The previous prime is 113891059. The next prime is 113891137. The reversal of 113891131 is 131198311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113891131 - 2⁷ = 113891003 is a prime.

It is a super-2 number, since 2×113891131² = 25942379440918322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 113891131.

It is not a weakly prime, because it can be changed into another prime (113891137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56945565 + 56945566.

It is an arithmetic number, because the mean of its divisors is an integer number (56945566).

Almost surely, 2^113891131 is an apocalyptic number.

113891131 is a deficient number, since it is larger than the sum of its proper divisors (1).

113891131 is an equidigital number, since it uses as much as digits as its factorization.

113891131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 28.

The square root of 113891131 is about 10671.9787762158. The cubic root of 113891131 is about 484.7263571325.

The spelling of 113891131 in words is "one hundred thirteen million, eight hundred ninety-one thousand, one hundred thirty-one".