679579999 has 8 divisors (see below), whose sum is σ = 797654048. Its totient is φ = 566753760.

The previous prime is 679579991. The next prime is 679580021. The reversal of 679579999 is 999975976.

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 679579999 - 2³ = 679579991 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 (679579991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311672 + ... + 1312189.

It is an arithmetic number, because the mean of its divisors is an integer number (99706756).

Almost surely, 2^679579999 is an apocalyptic number.

679579999 is a deficient number, since it is larger than the sum of its proper divisors (118074049).

679579999 is a wasteful number, since it uses less digits than its factorization.

679579999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623905.

The product of its digits is 86802030, while the sum is 70.

The square root of 679579999 is about 26068.7552253651. The cubic root of 679579999 is about 879.1848507858.

The spelling of 679579999 in words is "six hundred seventy-nine million, five hundred seventy-nine thousand, nine hundred ninety-nine".