113661965 has 16 divisors (see below), whose sum is σ = 144606720. Its totient is φ = 85613760.

The previous prime is 113661941. The next prime is 113661967. The reversal of 113661965 is 569166311.

It is a happy number.

It is not a de Polignac number, because 113661965 - 2⁶ = 113661901 is a prime.

It is a super-2 number, since 2×113661965² = 25838084575322450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113661967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4175 + ... + 15644.

It is an arithmetic number, because the mean of its divisors is an integer number (9037920).

Almost surely, 2^113661965 is an apocalyptic number.

It is an amenable number.

113661965 is a deficient number, since it is larger than the sum of its proper divisors (30944755).

113661965 is a wasteful number, since it uses less digits than its factorization.

113661965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19892.

The product of its digits is 29160, while the sum is 38.

The square root of 113661965 is about 10661.2365605496. The cubic root of 113661965 is about 484.4010248383.

It can be divided in two parts, 11366 and 1965, that added together give a palindrome (13331).

The spelling of 113661965 in words is "one hundred thirteen million, six hundred sixty-one thousand, nine hundred sixty-five".