113817881 has 2 divisors, whose sum is σ = 113817882. Its totient is φ = 113817880.

The previous prime is 113817863. The next prime is 113817889. The reversal of 113817881 is 188718311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62552281 + 51265600 = 7909^2 + 7160^2 .

It is a cyclic number.

It is not a de Polignac number, because 113817881 - 2¹⁴ = 113801497 is a prime.

It is a super-2 number, since 2×113817881² = 25909020070660322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113817889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56908940 + 56908941.

It is an arithmetic number, because the mean of its divisors is an integer number (56908941).

Almost surely, 2^113817881 is an apocalyptic number.

It is an amenable number.

113817881 is a deficient number, since it is larger than the sum of its proper divisors (1).

113817881 is an equidigital number, since it uses as much as digits as its factorization.

113817881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 38.

The square root of 113817881 is about 10668.5463395910. The cubic root of 113817881 is about 484.6224162898.

The spelling of 113817881 in words is "one hundred thirteen million, eight hundred seventeen thousand, eight hundred eighty-one".