113619839 has 4 divisors (see below), whose sum is σ = 118559856. Its totient is φ = 108679824.

The previous prime is 113619827. The next prime is 113619853. The reversal of 113619839 is 938916311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938916311 = 463 ⋅2027897.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113619839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113619796 and 113619805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113619139) 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, 2469974 + ... + 2470019.

It is an arithmetic number, because the mean of its divisors is an integer number (29639964).

Almost surely, 2^113619839 is an apocalyptic number.

113619839 is a deficient number, since it is larger than the sum of its proper divisors (4940017).

113619839 is an equidigital number, since it uses as much as digits as its factorization.

113619839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940016.

The product of its digits is 34992, while the sum is 41.

The square root of 113619839 is about 10659.2607154530. The cubic root of 113619839 is about 484.3411736850.

The spelling of 113619839 in words is "one hundred thirteen million, six hundred nineteen thousand, eight hundred thirty-nine".