113908643 has 4 divisors (see below), whose sum is σ = 115608840. Its totient is φ = 112208448.

The previous prime is 113908603. The next prime is 113908651. The reversal of 113908643 is 346809311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346809311 = 1597 ⋅217163.

It is a cyclic number.

It is not a de Polignac number, because 113908643 - 2⁶ = 113908579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113908603) 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, 849998 + ... + 850131.

It is an arithmetic number, because the mean of its divisors is an integer number (28902210).

Almost surely, 2^113908643 is an apocalyptic number.

113908643 is a deficient number, since it is larger than the sum of its proper divisors (1700197).

113908643 is an equidigital number, since it uses as much as digits as its factorization.

113908643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700196.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 113908643 is about 10672.7992110786. The cubic root of 113908643 is about 484.7511998423.

The spelling of 113908643 in words is "one hundred thirteen million, nine hundred eight thousand, six hundred forty-three".