113315987 has 4 divisors (see below), whose sum is σ = 114066576. Its totient is φ = 112565400.

The previous prime is 113315977. The next prime is 113316011. The reversal of 113315987 is 789513311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789513311 = 2719 ⋅290369.

It is a cyclic number.

It is not a de Polignac number, because 113315987 - 2⁴ = 113315971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113315987.

It is not an unprimeable number, because it can be changed into a prime (113315927) 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, 375068 + ... + 375369.

It is an arithmetic number, because the mean of its divisors is an integer number (28516644).

Almost surely, 2^113315987 is an apocalyptic number.

113315987 is a deficient number, since it is larger than the sum of its proper divisors (750589).

113315987 is an equidigital number, since it uses as much as digits as its factorization.

113315987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750588.

The product of its digits is 22680, while the sum is 38.

The square root of 113315987 is about 10644.9982151243. The cubic root of 113315987 is about 483.9090325475.

Adding to 113315987 its sum of digits (38), we get a square (113316025 = 10645²).

The spelling of 113315987 in words is "one hundred thirteen million, three hundred fifteen thousand, nine hundred eighty-seven".