113685991 has 2 divisors, whose sum is σ = 113685992. Its totient is φ = 113685990.

The previous prime is 113685967. The next prime is 113686031. The reversal of 113685991 is 199586311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113685991 - 2²³ = 105297383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113685931) 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, 56842995 + 56842996.

It is an arithmetic number, because the mean of its divisors is an integer number (56842996).

Almost surely, 2^113685991 is an apocalyptic number.

113685991 is a deficient number, since it is larger than the sum of its proper divisors (1).

113685991 is an equidigital number, since it uses as much as digits as its factorization.

113685991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 43.

The square root of 113685991 is about 10662.3632933792. The cubic root of 113685991 is about 484.4351535200.

The spelling of 113685991 in words is "one hundred thirteen million, six hundred eighty-five thousand, nine hundred ninety-one".