113439 has 4 divisors (see below), whose sum is σ = 151256. Its totient is φ = 75624.

The previous prime is 113437. The next prime is 113453. The reversal of 113439 is 934311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 113439 - 2¹ = 113437 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113437) 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, 18904 + ... + 18909.

It is an arithmetic number, because the mean of its divisors is an integer number (37814).

2¹¹³⁴³⁹ is an apocalyptic number.

113439 is a deficient number, since it is larger than the sum of its proper divisors (37817).

113439 is an equidigital number, since it uses as much as digits as its factorization.

113439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37816.

The product of its digits is 324, while the sum is 21.

The square root of 113439 is about 336.8070664342. The cubic root of 113439 is about 48.4084075734.

The spelling of 113439 in words is "one hundred thirteen thousand, four hundred thirty-nine".