113666813 has 8 divisors (see below), whose sum is σ = 123495288. Its totient is φ = 103993344.

The previous prime is 113666809. The next prime is 113666827. The reversal of 113666813 is 318666311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4401604 + 109265209 = 2098^2 + 10453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 113666813 - 2² = 113666809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113666803) 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 in 7 ways as a sum of consecutive naturals, for example, 37220 + ... + 40157.

It is an arithmetic number, because the mean of its divisors is an integer number (15436911).

Almost surely, 2^113666813 is an apocalyptic number.

113666813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

113666813 is a deficient number, since it is larger than the sum of its proper divisors (9828475).

113666813 is a wasteful number, since it uses less digits than its factorization.

113666813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77503.

The product of its digits is 15552, while the sum is 35.

The square root of 113666813 is about 10661.4639238709. The cubic root of 113666813 is about 484.4079117588.

The spelling of 113666813 in words is "one hundred thirteen million, six hundred sixty-six thousand, eight hundred thirteen".