79646563 has 4 divisors (see below), whose sum is σ = 79876440. Its totient is φ = 79416688.

The previous prime is 79646503. The next prime is 79646573. The reversal of 79646563 is 36564697.

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 79646563 - 2⁹ = 79646051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79646503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114418 + ... + 115111.

It is an arithmetic number, because the mean of its divisors is an integer number (19969110).

Almost surely, 2^79646563 is an apocalyptic number.

79646563 is a deficient number, since it is larger than the sum of its proper divisors (229877).

79646563 is a wasteful number, since it uses less digits than its factorization.

79646563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229876.

The product of its digits is 816480, while the sum is 46.

The square root of 79646563 is about 8924.4923104903. The cubic root of 79646563 is about 430.2514537925.

The spelling of 79646563 in words is "seventy-nine million, six hundred forty-six thousand, five hundred sixty-three".