113509919 has 2 divisors, whose sum is σ = 113509920. Its totient is φ = 113509918.

The previous prime is 113509897. The next prime is 113509931. The reversal of 113509919 is 919905311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113509919 is a prime.

It is a super-2 number, since 2×113509919² = 25769003422773122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113509939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56754959 + 56754960.

It is an arithmetic number, because the mean of its divisors is an integer number (56754960).

Almost surely, 2^113509919 is an apocalyptic number.

113509919 is a deficient number, since it is larger than the sum of its proper divisors (1).

113509919 is an equidigital number, since it uses as much as digits as its factorization.

113509919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10935, while the sum is 38.

The square root of 113509919 is about 10654.1033878971. The cubic root of 113509919 is about 484.1849334840.

The spelling of 113509919 in words is "one hundred thirteen million, five hundred nine thousand, nine hundred nineteen".