113517409 has 4 divisors (see below), whose sum is σ = 115072516. Its totient is φ = 111962304.

The previous prime is 113517407. The next prime is 113517413. The reversal of 113517409 is 904715311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904715311 = 2281 ⋅396631.

It can be written as a sum of positive squares in 2 ways, for example, as 41216400 + 72301009 = 6420^2 + 8503^2 .

It is a cyclic number.

It is not a de Polignac number, because 113517409 - 2¹ = 113517407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113517407) 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 in 3 ways as a sum of consecutive naturals, for example, 777444 + ... + 777589.

It is an arithmetic number, because the mean of its divisors is an integer number (28768129).

Almost surely, 2^113517409 is an apocalyptic number.

It is an amenable number.

113517409 is a deficient number, since it is larger than the sum of its proper divisors (1555107).

113517409 is an equidigital number, since it uses as much as digits as its factorization.

113517409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555106.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 113517409 is about 10654.4548898571. The cubic root of 113517409 is about 484.1955829656.

The spelling of 113517409 in words is "one hundred thirteen million, five hundred seventeen thousand, four hundred nine".