113997691 has 2 divisors, whose sum is σ = 113997692. Its totient is φ = 113997690.

The previous prime is 113997679. The next prime is 113997721. The reversal of 113997691 is 196799311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113997691 - 2¹⁷ = 113866619 is a prime.

It is not a weakly prime, because it can be changed into another prime (113997661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56998845 + 56998846.

It is an arithmetic number, because the mean of its divisors is an integer number (56998846).

Almost surely, 2^113997691 is an apocalyptic number.

113997691 is a deficient number, since it is larger than the sum of its proper divisors (1).

113997691 is an equidigital number, since it uses as much as digits as its factorization.

113997691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 46.

The square root of 113997691 is about 10676.9701226518. The cubic root of 113997691 is about 484.8774849079.

The spelling of 113997691 in words is "one hundred thirteen million, nine hundred ninety-seven thousand, six hundred ninety-one".