113581693 has 4 divisors (see below), whose sum is σ = 113612220. Its totient is φ = 113551168.

The previous prime is 113581687. The next prime is 113581723. The reversal of 113581693 is 396185311.

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 38464804 + 75116889 = 6202^2 + 8667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113581693 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 (113581673) 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, 8758 + ... + 17431.

It is an arithmetic number, because the mean of its divisors is an integer number (28403055).

Almost surely, 2^113581693 is an apocalyptic number.

It is an amenable number.

113581693 is a deficient number, since it is larger than the sum of its proper divisors (30527).

113581693 is an equidigital number, since it uses as much as digits as its factorization.

113581693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30526.

The product of its digits is 19440, while the sum is 37.

The square root of 113581693 is about 10657.4712291425. The cubic root of 113581693 is about 484.2869644125.

It can be divided in two parts, 1135 and 81693, that added together give a palindrome (82828).

The spelling of 113581693 in words is "one hundred thirteen million, five hundred eighty-one thousand, six hundred ninety-three".