113618581 has 2 divisors, whose sum is σ = 113618582. Its totient is φ = 113618580.

The previous prime is 113618573. The next prime is 113618611. The reversal of 113618581 is 185816311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93896100 + 19722481 = 9690^2 + 4441^2 .

It is a cyclic number.

It is not a de Polignac number, because 113618581 - 2³ = 113618573 is a prime.

It is a super-2 number, since 2×113618581² = 25818363896907122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113618501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56809290 + 56809291.

It is an arithmetic number, because the mean of its divisors is an integer number (56809291).

Almost surely, 2^113618581 is an apocalyptic number.

It is an amenable number.

113618581 is a deficient number, since it is larger than the sum of its proper divisors (1).

113618581 is an equidigital number, since it uses as much as digits as its factorization.

113618581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 34.

The square root of 113618581 is about 10659.2017055688. The cubic root of 113618581 is about 484.3393861349.

The spelling of 113618581 in words is "one hundred thirteen million, six hundred eighteen thousand, five hundred eighty-one".