679538497 has 4 divisors (see below), whose sum is σ = 741314736. Its totient is φ = 617762260.

The previous prime is 679538491. The next prime is 679538533. The reversal of 679538497 is 794835976.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679538497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679538491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30888103 + ... + 30888124.

It is an arithmetic number, because the mean of its divisors is an integer number (185328684).

Almost surely, 2^679538497 is an apocalyptic number.

It is an amenable number.

679538497 is a deficient number, since it is larger than the sum of its proper divisors (61776239).

679538497 is a wasteful number, since it uses less digits than its factorization.

679538497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61776238.

The product of its digits is 11430720, while the sum is 58.

The square root of 679538497 is about 26067.9592028221. The cubic root of 679538497 is about 879.1669531271.

The spelling of 679538497 in words is "six hundred seventy-nine million, five hundred thirty-eight thousand, four hundred ninety-seven".