679806249 has 8 divisors (see below), whose sum is σ = 923510592. Its totient is φ = 444653040.

The previous prime is 679806247. The next prime is 679806269. The reversal of 679806249 is 942608976.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 679806249 - 2¹ = 679806247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (679806241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2137597 + ... + 2137914.

It is an arithmetic number, because the mean of its divisors is an integer number (115438824).

Almost surely, 2^679806249 is an apocalyptic number.

It is an amenable number.

679806249 is a deficient number, since it is larger than the sum of its proper divisors (243704343).

679806249 is a wasteful number, since it uses less digits than its factorization.

679806249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275567.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 679806249 is about 26073.0943503068. The cubic root of 679806249 is about 879.2824078564.

The spelling of 679806249 in words is "six hundred seventy-nine million, eight hundred six thousand, two hundred forty-nine".