79928947 has 16 divisors (see below), whose sum is σ = 93760000. Its totient is φ = 68108040.

The previous prime is 79928939. The next prime is 79928969. The reversal of 79928947 is 74982997.

It is not a de Polignac number, because 79928947 - 2³ = 79928939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79928977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67672 + ... + 68842.

It is an arithmetic number, because the mean of its divisors is an integer number (5860000).

Almost surely, 2^79928947 is an apocalyptic number.

79928947 is a deficient number, since it is larger than the sum of its proper divisors (13831053).

79928947 is a wasteful number, since it uses less digits than its factorization.

79928947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391 (or 1377 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The square root of 79928947 is about 8940.2990442155. The cubic root of 79928947 is about 430.7593343480.

The spelling of 79928947 in words is "seventy-nine million, nine hundred twenty-eight thousand, nine hundred forty-seven".