79628863 has 4 divisors (see below), whose sum is σ = 82197568. Its totient is φ = 77060160.

The previous prime is 79628849. The next prime is 79628869. The reversal of 79628863 is 36882697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36882697 = 3767 ⋅9791.

It is a cyclic number.

It is not a de Polignac number, because 79628863 - 2⁵ = 79628831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79628869) 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, 1284306 + ... + 1284367.

It is an arithmetic number, because the mean of its divisors is an integer number (20549392).

Almost surely, 2^79628863 is an apocalyptic number.

79628863 is a deficient number, since it is larger than the sum of its proper divisors (2568705).

79628863 is a wasteful number, since it uses less digits than its factorization.

79628863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568704.

The product of its digits is 870912, while the sum is 49.

The square root of 79628863 is about 8923.5006023421. The cubic root of 79628863 is about 430.2195795778.

The spelling of 79628863 in words is "seventy-nine million, six hundred twenty-eight thousand, eight hundred sixty-three".