74106839 has 4 divisors (see below), whose sum is σ = 74128824. Its totient is φ = 74084856.

The previous prime is 74106817. The next prime is 74106853. The reversal of 74106839 is 93860147.

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

It is a cyclic number.

It is not a de Polignac number, because 74106839 - 2⁸ = 74106583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74106239) 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, 4757 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (18532206).

Almost surely, 2^74106839 is an apocalyptic number.

74106839 is a deficient number, since it is larger than the sum of its proper divisors (21985).

74106839 is a wasteful number, since it uses less digits than its factorization.

74106839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21984.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 74106839 is about 8608.5329179832. The cubic root of 74106839 is about 420.0355960005.

The spelling of 74106839 in words is "seventy-four million, one hundred six thousand, eight hundred thirty-nine".