79390849 has 4 divisors (see below), whose sum is σ = 81080064. Its totient is φ = 77701636.

The previous prime is 79390841. The next prime is 79390853. The reversal of 79390849 is 94809397.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79390849 - 2³ = 79390841 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79390841) 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, 844537 + ... + 844630.

It is an arithmetic number, because the mean of its divisors is an integer number (20270016).

Almost surely, 2^79390849 is an apocalyptic number.

It is an amenable number.

79390849 is a deficient number, since it is larger than the sum of its proper divisors (1689215).

79390849 is a wasteful number, since it uses less digits than its factorization.

79390849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689214.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 79390849 is about 8910.1542635355. The cubic root of 79390849 is about 429.7905036826.

The spelling of 79390849 in words is "seventy-nine million, three hundred ninety thousand, eight hundred forty-nine".