679180997 has 4 divisors (see below), whose sum is σ = 740924736. Its totient is φ = 617437260.

The previous prime is 679180987. The next prime is 679181021. The reversal of 679180997 is 799081976.

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 not a de Polignac number, because 679180997 - 2⁴ = 679180981 is a prime.

It is a super-2 number, since 2×679180997² = 922573653371828018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679180987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30871853 + ... + 30871874.

It is an arithmetic number, because the mean of its divisors is an integer number (185231184).

Almost surely, 2^679180997 is an apocalyptic number.

It is an amenable number.

679180997 is a deficient number, since it is larger than the sum of its proper divisors (61743739).

679180997 is a wasteful number, since it uses less digits than its factorization.

679180997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61743738.

The product of its (nonzero) digits is 1714608, while the sum is 56.

The square root of 679180997 is about 26061.1012238547. The cubic root of 679180997 is about 879.0127517485.

The spelling of 679180997 in words is "six hundred seventy-nine million, one hundred eighty thousand, nine hundred ninety-seven".