113685809 has 8 divisors (see below), whose sum is σ = 116328960. Its totient is φ = 111052096.

The previous prime is 113685779. The next prime is 113685811. The reversal of 113685809 is 908586311.

113685809 = 107² + 108² + ... + 699².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113685809 - 2¹² = 113681713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113685889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25832 + ... + 29910.

It is an arithmetic number, because the mean of its divisors is an integer number (14541120).

Almost surely, 2^113685809 is an apocalyptic number.

It is an amenable number.

113685809 is a deficient number, since it is larger than the sum of its proper divisors (2643151).

113685809 is an equidigital number, since it uses as much as digits as its factorization.

113685809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 113685809 is about 10662.3547586825. The cubic root of 113685809 is about 484.4348950090.

The spelling of 113685809 in words is "one hundred thirteen million, six hundred eighty-five thousand, eight hundred nine".