113597989 has 6 divisors (see below), whose sum is σ = 118752326. Its totient is φ = 108658440.

The previous prime is 113597987. The next prime is 113598007. The reversal of 113597989 is 989795311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72420100 + 41177889 = 8510^2 + 6417^2 .

It is not a de Polignac number, because 113597989 - 2¹ = 113597987 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 (113597987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106842 + ... + 107899.

Almost surely, 2^113597989 is an apocalyptic number.

It is an amenable number.

113597989 is a deficient number, since it is larger than the sum of its proper divisors (5154337).

113597989 is an equidigital number, since it uses as much as digits as its factorization.

113597989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214787 (or 214764 counting only the distinct ones).

The product of its digits is 612360, while the sum is 52.

The square root of 113597989 is about 10658.2357358054. The cubic root of 113597989 is about 484.3101241394.

The spelling of 113597989 in words is "one hundred thirteen million, five hundred ninety-seven thousand, nine hundred eighty-nine".