113868109 has 2 divisors, whose sum is σ = 113868110. Its totient is φ = 113868108.

The previous prime is 113868089. The next prime is 113868127. The reversal of 113868109 is 901868311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111894084 + 1974025 = 10578^2 + 1405^2 .

It is an emirp because it is prime and its reverse (901868311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113868109 - 2⁵ = 113868077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113868149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56934054 + 56934055.

It is an arithmetic number, because the mean of its divisors is an integer number (56934055).

Almost surely, 2^113868109 is an apocalyptic number.

It is an amenable number.

113868109 is a deficient number, since it is larger than the sum of its proper divisors (1).

113868109 is an equidigital number, since it uses as much as digits as its factorization.

113868109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 113868109 is about 10670.9001026155. The cubic root of 113868109 is about 484.6936940033.

The spelling of 113868109 in words is "one hundred thirteen million, eight hundred sixty-eight thousand, one hundred nine".