113391809 has 2 divisors, whose sum is σ = 113391810. Its totient is φ = 113391808.

The previous prime is 113391799. The next prime is 113391841. The reversal of 113391809 is 908193311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94031809 + 19360000 = 9697^2 + 4400^2 .

It is a cyclic number.

It is not a de Polignac number, because 113391809 - 2¹⁶ = 113326273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113391409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56695904 + 56695905.

It is an arithmetic number, because the mean of its divisors is an integer number (56695905).

Almost surely, 2^113391809 is an apocalyptic number.

It is an amenable number.

113391809 is a deficient number, since it is larger than the sum of its proper divisors (1).

113391809 is an equidigital number, since it uses as much as digits as its factorization.

113391809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 113391809 is about 10648.5590104953. The cubic root of 113391809 is about 484.0169395638.

The spelling of 113391809 in words is "one hundred thirteen million, three hundred ninety-one thousand, eight hundred nine".