79855863 has 4 divisors (see below), whose sum is σ = 106474488. Its totient is φ = 53237240.

The previous prime is 79855849. The next prime is 79855891. The reversal of 79855863 is 36855897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79855863 - 2⁹ = 79855351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79855843) 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, 13309308 + ... + 13309313.

It is an arithmetic number, because the mean of its divisors is an integer number (26618622).

Almost surely, 2^79855863 is an apocalyptic number.

79855863 is a deficient number, since it is larger than the sum of its proper divisors (26618625).

79855863 is a wasteful number, since it uses less digits than its factorization.

79855863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26618624.

The product of its digits is 1814400, while the sum is 51.

The square root of 79855863 is about 8936.2107741481. The cubic root of 79855863 is about 430.6280043086.

The spelling of 79855863 in words is "seventy-nine million, eight hundred fifty-five thousand, eight hundred sixty-three".