113809919 has 2 divisors, whose sum is σ = 113809920. Its totient is φ = 113809918.

The previous prime is 113809903. The next prime is 113809937. The reversal of 113809919 is 919908311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113809919 - 2⁴ = 113809903 is a prime.

It is a super-2 number, since 2×113809919² = 25905395325573122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113809979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56904959 + 56904960.

It is an arithmetic number, because the mean of its divisors is an integer number (56904960).

Almost surely, 2^113809919 is an apocalyptic number.

113809919 is a deficient number, since it is larger than the sum of its proper divisors (1).

113809919 is an equidigital number, since it uses as much as digits as its factorization.

113809919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 41.

The square root of 113809919 is about 10668.1731800716. The cubic root of 113809919 is about 484.6111156235.

The spelling of 113809919 in words is "one hundred thirteen million, eight hundred nine thousand, nine hundred nineteen".