79344639 has 12 divisors (see below), whose sum is σ = 125028072. Its totient is φ = 48087600.

The previous prime is 79344637. The next prime is 79344689. The reversal of 79344639 is 93644397.

79344639 is a `hidden beast` number, since 7 + 9 + 3 + 4 + 4 + 639 = 666.

It is not a de Polignac number, because 79344639 - 2¹ = 79344637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79344594 and 79344603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79344631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 400632 + ... + 400829.

It is an arithmetic number, because the mean of its divisors is an integer number (10419006).

Almost surely, 2^79344639 is an apocalyptic number.

79344639 is a deficient number, since it is larger than the sum of its proper divisors (45683433).

79344639 is a wasteful number, since it uses less digits than its factorization.

79344639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801478 (or 801475 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 79344639 is about 8907.5607772274. The cubic root of 79344639 is about 429.7070999738.

The spelling of 79344639 in words is "seventy-nine million, three hundred forty-four thousand, six hundred thirty-nine".