679067791 has 4 divisors (see below), whose sum is σ = 679120632. Its totient is φ = 679014952.

The previous prime is 679067783. The next prime is 679067833. The reversal of 679067791 is 197760976.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 679067791 - 2³ = 679067783 is a prime.

It is a super-2 number, since 2×679067791² = 922266129547239362, 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 (679067491) 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, 6681 + ... + 37453.

It is an arithmetic number, because the mean of its divisors is an integer number (169780158).

Almost surely, 2^679067791 is an apocalyptic number.

679067791 is a deficient number, since it is larger than the sum of its proper divisors (52841).

679067791 is a wasteful number, since it uses less digits than its factorization.

679067791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52840.

The product of its (nonzero) digits is 1000188, while the sum is 52.

The square root of 679067791 is about 26058.9291990289. The cubic root of 679067791 is about 878.9639110383.

The spelling of 679067791 in words is "six hundred seventy-nine million, sixty-seven thousand, seven hundred ninety-one".