113131409 has 8 divisors (see below), whose sum is σ = 115950912. Its totient is φ = 110320560.

The previous prime is 113131399. The next prime is 113131429. The reversal of 113131409 is 904131311.

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 113131409 - 2²⁰ = 112082833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113131429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30179 + ... + 33719.

It is an arithmetic number, because the mean of its divisors is an integer number (14493864).

Almost surely, 2^113131409 is an apocalyptic number.

It is an amenable number.

113131409 is a deficient number, since it is larger than the sum of its proper divisors (2819503).

113131409 is an equidigital number, since it uses as much as digits as its factorization.

113131409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 113131409 is about 10636.3249762312. The cubic root of 113131409 is about 483.6461467174.

The spelling of 113131409 in words is "one hundred thirteen million, one hundred thirty-one thousand, four hundred nine".