113681609 has 4 divisors (see below), whose sum is σ = 114191616. Its totient is φ = 113171604.

The previous prime is 113681593. The next prime is 113681611. The reversal of 113681609 is 906186311.

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.

It is a cyclic number.

It is not a de Polignac number, because 113681609 - 2⁴ = 113681593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113681629) 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, 254669 + ... + 255114.

It is an arithmetic number, because the mean of its divisors is an integer number (28547904).

Almost surely, 2^113681609 is an apocalyptic number.

It is an amenable number.

113681609 is a deficient number, since it is larger than the sum of its proper divisors (510007).

113681609 is an equidigital number, since it uses as much as digits as its factorization.

113681609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510006.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 113681609 is about 10662.1578022462. The cubic root of 113681609 is about 484.4289292934.

The spelling of 113681609 in words is "one hundred thirteen million, six hundred eighty-one thousand, six hundred nine".