679427217 has 32 divisors (see below), whose sum is σ = 1187471360. Its totient is φ = 375716880.

The previous prime is 679427207. The next prime is 679427233. The reversal of 679427217 is 712724976.

679427217 is a `hidden beast` number, since 6 + 7 + 9 + 427 + 217 = 666.

It is not a de Polignac number, because 679427217 - 2⁴ = 679427201 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679427207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52123 + ... + 63840.

It is an arithmetic number, because the mean of its divisors is an integer number (37108480).

Almost surely, 2^679427217 is an apocalyptic number.

It is an amenable number.

679427217 is a deficient number, since it is larger than the sum of its proper divisors (508044143).

679427217 is a wasteful number, since it uses less digits than its factorization.

679427217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116010 (or 116004 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 679427217 is about 26065.8246944155. The cubic root of 679427217 is about 879.1189602419.

The spelling of 679427217 in words is "six hundred seventy-nine million, four hundred twenty-seven thousand, two hundred seventeen".