113913161 has 4 divisors (see below), whose sum is σ = 114336900. Its totient is φ = 113489424.

The previous prime is 113913157. The next prime is 113913167. The reversal of 113913161 is 161319311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161319311 = 4073 ⋅39607.

It can be written as a sum of positive squares in 2 ways, for example, as 43033600 + 70879561 = 6560^2 + 8419^2 .

It is a cyclic number.

It is not a de Polignac number, because 113913161 - 2² = 113913157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 113913161.

It is not an unprimeable number, because it can be changed into a prime (113913167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211466 + ... + 212003.

It is an arithmetic number, because the mean of its divisors is an integer number (28584225).

Almost surely, 2^113913161 is an apocalyptic number.

It is an amenable number.

113913161 is a deficient number, since it is larger than the sum of its proper divisors (423739).

113913161 is an equidigital number, since it uses as much as digits as its factorization.

113913161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423738.

The product of its digits is 486, while the sum is 26.

The square root of 113913161 is about 10673.0108685413. The cubic root of 113913161 is about 484.7576087120.

The spelling of 113913161 in words is "one hundred thirteen million, nine hundred thirteen thousand, one hundred sixty-one".