79774805 has 16 divisors (see below), whose sum is σ = 106406784. Its totient is φ = 56921280.

The previous prime is 79774801. The next prime is 79774831. The reversal of 79774805 is 50847797.

It is not a de Polignac number, because 79774805 - 2² = 79774801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79774805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79774801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10769 + ... + 16598.

It is an arithmetic number, because the mean of its divisors is an integer number (6650424).

Almost surely, 2^79774805 is an apocalyptic number.

It is an amenable number.

79774805 is a deficient number, since it is larger than the sum of its proper divisors (26631979).

79774805 is a wasteful number, since it uses less digits than its factorization.

79774805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27436.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 79774805 is about 8931.6742551439. The cubic root of 79774805 is about 430.4822514460.

The spelling of 79774805 in words is "seventy-nine million, seven hundred seventy-four thousand, eight hundred five".