74839 has 4 divisors (see below), whose sum is σ = 76024. Its totient is φ = 73656.

The previous prime is 74831. The next prime is 74843. The reversal of 74839 is 93847.

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: 93847 = 13 ⋅7219.

It is a cyclic number.

It is not a de Polignac number, because 74839 - 2³ = 74831 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 74839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74831) 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, 492 + ... + 625.

It is an arithmetic number, because the mean of its divisors is an integer number (19006).

2⁷⁴⁸³⁹ is an apocalyptic number.

74839 is a deficient number, since it is larger than the sum of its proper divisors (1185).

74839 is a wasteful number, since it uses less digits than its factorization.

74839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184.

The product of its digits is 6048, while the sum is 31.

The square root of 74839 is about 273.5671763937. The cubic root of 74839 is about 42.1414355001.

It can be divided in two parts, 748 and 39, that added together give a palindrome (787).

The spelling of 74839 in words is "seventy-four thousand, eight hundred thirty-nine".