79487279 has 8 divisors (see below), whose sum is σ = 83994240. Its totient is φ = 75012696.

The previous prime is 79487237. The next prime is 79487297. The reversal of 79487279 is 97278497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79487279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79487279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79481279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2957 + ... + 12950.

It is an arithmetic number, because the mean of its divisors is an integer number (10499280).

Almost surely, 2^79487279 is an apocalyptic number.

79487279 is a deficient number, since it is larger than the sum of its proper divisors (4506961).

79487279 is a wasteful number, since it uses less digits than its factorization.

79487279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16189.

The product of its digits is 1778112, while the sum is 53.

The square root of 79487279 is about 8915.5638632674. The cubic root of 79487279 is about 429.9644445092.

The spelling of 79487279 in words is "seventy-nine million, four hundred eighty-seven thousand, two hundred seventy-nine".