113637409 has 4 divisors (see below), whose sum is σ = 113909040. Its totient is φ = 113365780.

The previous prime is 113637389. The next prime is 113637431. The reversal of 113637409 is 904736311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 904736311 = 17 ⋅53219783.

It is a cyclic number.

It is not a de Polignac number, because 113637409 - 2²¹ = 111540257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113637439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135187 + ... + 136024.

It is an arithmetic number, because the mean of its divisors is an integer number (28477260).

Almost surely, 2^113637409 is an apocalyptic number.

It is an amenable number.

113637409 is a deficient number, since it is larger than the sum of its proper divisors (271631).

113637409 is an equidigital number, since it uses as much as digits as its factorization.

113637409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271630.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 113637409 is about 10660.0848495685. The cubic root of 113637409 is about 484.3661383269.

The spelling of 113637409 in words is "one hundred thirteen million, six hundred thirty-seven thousand, four hundred nine".