113811917 has 2 divisors, whose sum is σ = 113811918. Its totient is φ = 113811916.

The previous prime is 113811911. The next prime is 113811931. The reversal of 113811917 is 719118311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78039556 + 35772361 = 8834^2 + 5981^2 .

It is a cyclic number.

It is not a de Polignac number, because 113811917 - 2⁶ = 113811853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113811911) 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, 56905958 + 56905959.

It is an arithmetic number, because the mean of its divisors is an integer number (56905959).

Almost surely, 2^113811917 is an apocalyptic number.

It is an amenable number.

113811917 is a deficient number, since it is larger than the sum of its proper divisors (1).

113811917 is an equidigital number, since it uses as much as digits as its factorization.

113811917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 32.

The square root of 113811917 is about 10668.2668226849. The cubic root of 113811917 is about 484.6139514845.

The spelling of 113811917 in words is "one hundred thirteen million, eight hundred eleven thousand, nine hundred seventeen".