113166398909 has 2 divisors, whose sum is σ = 113166398910. Its totient is φ = 113166398908.

The previous prime is 113166398879. The next prime is 113166398929. The reversal of 113166398909 is 909893661311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105626950009 + 7539448900 = 325003^2 + 86830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113166398909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113166398929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56583199454 + 56583199455.

It is an arithmetic number, because the mean of its divisors is an integer number (56583199455).

Almost surely, 2^113166398909 is an apocalyptic number.

It is an amenable number.

113166398909 is a deficient number, since it is larger than the sum of its proper divisors (1).

113166398909 is an equidigital number, since it uses as much as digits as its factorization.

113166398909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The spelling of 113166398909 in words is "one hundred thirteen billion, one hundred sixty-six million, three hundred ninety-eight thousand, nine hundred nine".