679719997 has 8 divisors (see below), whose sum is σ = 743169600. Its totient is φ = 616546560.

The previous prime is 679719923. The next prime is 679720021. The reversal of 679719997 is 799917976.

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

It is a cyclic number.

It is not a de Polignac number, because 679719997 - 2¹¹ = 679717949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679719907) 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, 63873 + ... + 73750.

It is an arithmetic number, because the mean of its divisors is an integer number (92896200).

Almost surely, 2^679719997 is an apocalyptic number.

It is an amenable number.

679719997 is a deficient number, since it is larger than the sum of its proper divisors (63449603).

679719997 is a wasteful number, since it uses less digits than its factorization.

679719997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138083.

The product of its digits is 13502538, while the sum is 64.

The square root of 679719997 is about 26071.4402555747. The cubic root of 679719997 is about 879.2452192829.

The spelling of 679719997 in words is "six hundred seventy-nine million, seven hundred nineteen thousand, nine hundred ninety-seven".