79808847 has 4 divisors (see below), whose sum is σ = 106411800. Its totient is φ = 53205896.

The previous prime is 79808821. The next prime is 79808857. The reversal of 79808847 is 74880897.

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 79808847 - 2⁷ = 79808719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79808847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79808857) 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, 13301472 + ... + 13301477.

It is an arithmetic number, because the mean of its divisors is an integer number (26602950).

Almost surely, 2^79808847 is an apocalyptic number.

79808847 is a deficient number, since it is larger than the sum of its proper divisors (26602953).

79808847 is a wasteful number, since it uses less digits than its factorization.

79808847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26602952.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 79808847 is about 8933.5797416265. The cubic root of 79808847 is about 430.5434754244.

The spelling of 79808847 in words is "seventy-nine million, eight hundred eight thousand, eight hundred forty-seven".