113398409 has 2 divisors, whose sum is σ = 113398410. Its totient is φ = 113398408.

The previous prime is 113398379. The next prime is 113398463. The reversal of 113398409 is 904893311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 38402809 = 8660^2 + 6197^2 .

It is a cyclic number.

It is not a de Polignac number, because 113398409 - 2²⁴ = 96621193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (113398309) 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, 56699204 + 56699205.

It is an arithmetic number, because the mean of its divisors is an integer number (56699205).

Almost surely, 2^113398409 is an apocalyptic number.

It is an amenable number.

113398409 is a deficient number, since it is larger than the sum of its proper divisors (1).

113398409 is an equidigital number, since it uses as much as digits as its factorization.

113398409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 113398409 is about 10648.8689070718. The cubic root of 113398409 is about 484.0263301592.

The spelling of 113398409 in words is "one hundred thirteen million, three hundred ninety-eight thousand, four hundred nine".