79947771 has 8 divisors (see below), whose sum is σ = 106864464. Its totient is φ = 53164800.

The previous prime is 79947761. The next prime is 79947779. The reversal of 79947771 is 17774997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79947771 - 2⁵ = 79947739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79947779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32026 + ... + 34431.

It is an arithmetic number, because the mean of its divisors is an integer number (13358058).

Almost surely, 2^79947771 is an apocalyptic number.

79947771 is a deficient number, since it is larger than the sum of its proper divisors (26916693).

79947771 is a wasteful number, since it uses less digits than its factorization.

79947771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66861.

The product of its digits is 777924, while the sum is 51.

The square root of 79947771 is about 8941.3517434446. The cubic root of 79947771 is about 430.7931476182.

The spelling of 79947771 in words is "seventy-nine million, nine hundred forty-seven thousand, seven hundred seventy-one".