113806621 has 2 divisors, whose sum is σ = 113806622. Its totient is φ = 113806620.

The previous prime is 113806613. The next prime is 113806633. The reversal of 113806621 is 126608311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 45562500 = 8261^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 113806621 - 2³ = 113806613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113806621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113806601) 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, 56903310 + 56903311.

It is an arithmetic number, because the mean of its divisors is an integer number (56903311).

Almost surely, 2^113806621 is an apocalyptic number.

It is an amenable number.

113806621 is a deficient number, since it is larger than the sum of its proper divisors (1).

113806621 is an equidigital number, since it uses as much as digits as its factorization.

113806621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 113806621 is about 10668.0186070329. The cubic root of 113806621 is about 484.6064345350.

The spelling of 113806621 in words is "one hundred thirteen million, eight hundred six thousand, six hundred twenty-one".