113871409 has 4 divisors (see below), whose sum is σ = 114076404. Its totient is φ = 113666416.

The previous prime is 113871383. The next prime is 113871419. The reversal of 113871409 is 904178311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24285184 + 89586225 = 4928^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 113871409 - 2⁵ = 113871377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113871419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101662 + ... + 102775.

It is an arithmetic number, because the mean of its divisors is an integer number (28519101).

Almost surely, 2^113871409 is an apocalyptic number.

It is an amenable number.

113871409 is a deficient number, since it is larger than the sum of its proper divisors (204995).

113871409 is an equidigital number, since it uses as much as digits as its factorization.

113871409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204994.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 113871409 is about 10671.0547276265. The cubic root of 113871409 is about 484.6983762441.

The spelling of 113871409 in words is "one hundred thirteen million, eight hundred seventy-one thousand, four hundred nine".