113387 has 4 divisors (see below), whose sum is σ = 115056. Its totient is φ = 111720.

The previous prime is 113383. The next prime is 113417. The reversal of 113387 is 783311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783311 = 23 ⋅34057.

It is a cyclic number.

It is not a de Polignac number, because 113387 - 2² = 113383 is a prime.

It is a super-2 number, since 2×113387² = 25713223538, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113381) 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, 728 + ... + 869.

It is an arithmetic number, because the mean of its divisors is an integer number (28764).

2¹¹³³⁸⁷ is an apocalyptic number.

113387 is a deficient number, since it is larger than the sum of its proper divisors (1669).

113387 is an equidigital number, since it uses as much as digits as its factorization.

113387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668.

The product of its digits is 504, while the sum is 23.

The square root of 113387 is about 336.7298620556. The cubic root of 113387 is about 48.4010097005.

Adding to 113387 its reverse (783311), we get a palindrome (896698).

The spelling of 113387 in words is "one hundred thirteen thousand, three hundred eighty-seven".