113638381 has 2 divisors, whose sum is σ = 113638382. Its totient is φ = 113638380.

The previous prime is 113638363. The next prime is 113638391. The reversal of 113638381 is 183836311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110965156 + 2673225 = 10534^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 113638381 - 2⁷ = 113638253 is a prime.

It is a super-2 number, since 2×113638381² = 25827363272602322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113638351) 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, 56819190 + 56819191.

It is an arithmetic number, because the mean of its divisors is an integer number (56819191).

Almost surely, 2^113638381 is an apocalyptic number.

It is an amenable number.

113638381 is a deficient number, since it is larger than the sum of its proper divisors (1).

113638381 is an equidigital number, since it uses as much as digits as its factorization.

113638381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 113638381 is about 10660.1304401025. The cubic root of 113638381 is about 484.3675193350.

The spelling of 113638381 in words is "one hundred thirteen million, six hundred thirty-eight thousand, three hundred eighty-one".