799712217 has 8 divisors (see below), whose sum is σ = 1184758880. Its totient is φ = 533141460.

The previous prime is 799712209. The next prime is 799712227. The reversal of 799712217 is 712217997.

It is a happy number.

It is not a de Polignac number, because 799712217 - 2³ = 799712209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (799712227) 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, 14809459 + ... + 14809512.

It is an arithmetic number, because the mean of its divisors is an integer number (148094860).

Almost surely, 2^799712217 is an apocalyptic number.

It is an amenable number.

799712217 is a deficient number, since it is larger than the sum of its proper divisors (385046663).

799712217 is a wasteful number, since it uses less digits than its factorization.

799712217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29618980 (or 29618974 counting only the distinct ones).

The product of its digits is 111132, while the sum is 45.

The square root of 799712217 is about 28279.1834570944. The cubic root of 799712217 is about 928.2064391756.

The spelling of 799712217 in words is "seven hundred ninety-nine million, seven hundred twelve thousand, two hundred seventeen".