79408739 has 4 divisors (see below), whose sum is σ = 79765056. Its totient is φ = 79052424.

The previous prime is 79408711. The next prime is 79408741. The reversal of 79408739 is 93780497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93780497 = 439 ⋅213623.

It is a cyclic number.

It is not a de Polignac number, because 79408739 - 2²⁴ = 62631523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79408693 and 79408702.

It is not an unprimeable number, because it can be changed into a prime (79408339) 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, 177824 + ... + 178269.

It is an arithmetic number, because the mean of its divisors is an integer number (19941264).

Almost surely, 2^79408739 is an apocalyptic number.

79408739 is a deficient number, since it is larger than the sum of its proper divisors (356317).

79408739 is a wasteful number, since it uses less digits than its factorization.

79408739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356316.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 79408739 is about 8911.1581177757. The cubic root of 79408739 is about 429.8227843747.

The spelling of 79408739 in words is "seventy-nine million, four hundred eight thousand, seven hundred thirty-nine".