113620591 has 4 divisors (see below), whose sum is σ = 129852112. Its totient is φ = 97389072.

The previous prime is 113620583. The next prime is 113620601. The reversal of 113620591 is 195026311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195026311 = 4937 ⋅39503.

It is a cyclic number.

It is not a de Polignac number, because 113620591 - 2³ = 113620583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113620501) 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 3 ways as a sum of consecutive naturals, for example, 8115750 + ... + 8115763.

It is an arithmetic number, because the mean of its divisors is an integer number (32463028).

Almost surely, 2^113620591 is an apocalyptic number.

113620591 is a deficient number, since it is larger than the sum of its proper divisors (16231521).

113620591 is an equidigital number, since it uses as much as digits as its factorization.

113620591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16231520.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 113620591 is about 10659.2959898860. The cubic root of 113620591 is about 484.3422422300.

The spelling of 113620591 in words is "one hundred thirteen million, six hundred twenty thousand, five hundred ninety-one".