679430749 has 16 divisors (see below), whose sum is σ = 700580160. Its totient is φ = 658690560.

The previous prime is 679430729. The next prime is 679430809. The reversal of 679430749 is 947034976.

It is a cyclic number.

It is not a de Polignac number, because 679430749 - 2⁷ = 679430621 is a prime.

It is a super-2 number, since 2×679430749² = 923252285373402002, 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 (679430729) 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 15 ways as a sum of consecutive naturals, for example, 1924557 + ... + 1924909.

It is an arithmetic number, because the mean of its divisors is an integer number (43786260).

Almost surely, 2^679430749 is an apocalyptic number.

It is an amenable number.

679430749 is a deficient number, since it is larger than the sum of its proper divisors (21149411).

679430749 is a wasteful number, since it uses less digits than its factorization.

679430749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 679430749 is about 26065.8924458765. The cubic root of 679430749 is about 879.1204836048.

The spelling of 679430749 in words is "six hundred seventy-nine million, four hundred thirty thousand, seven hundred forty-nine".