113665409 has 16 divisors (see below), whose sum is σ = 133957824. Its totient is φ = 95083200.

The previous prime is 113665403. The next prime is 113665421. The reversal of 113665409 is 904566311.

It is a cyclic number.

It is not a de Polignac number, because 113665409 - 2¹² = 113661313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113665403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52274 + ... + 54404.

It is an arithmetic number, because the mean of its divisors is an integer number (8372364).

Almost surely, 2^113665409 is an apocalyptic number.

It is an amenable number.

113665409 is a deficient number, since it is larger than the sum of its proper divisors (20292415).

113665409 is a wasteful number, since it uses less digits than its factorization.

113665409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 113665409 is about 10661.3980790514. The cubic root of 113665409 is about 484.4059172995.

The spelling of 113665409 in words is "one hundred thirteen million, six hundred sixty-five thousand, four hundred nine".