79856573 has 4 divisors (see below), whose sum is σ = 79874688. Its totient is φ = 79838460.

The previous prime is 79856551. The next prime is 79856587. The reversal of 79856573 is 37565897.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37565897 = 3361 ⋅11177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79856573 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 (79856593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318 + ... + 12848.

It is an arithmetic number, because the mean of its divisors is an integer number (19968672).

Almost surely, 2^79856573 is an apocalyptic number.

It is an amenable number.

79856573 is a deficient number, since it is larger than the sum of its proper divisors (18115).

79856573 is a wasteful number, since it uses less digits than its factorization.

79856573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18114.

The product of its digits is 1587600, while the sum is 50.

The square root of 79856573 is about 8936.2505000699. The cubic root of 79856573 is about 430.6292805454.

The spelling of 79856573 in words is "seventy-nine million, eight hundred fifty-six thousand, five hundred seventy-three".