679800445 has 8 divisors (see below), whose sum is σ = 837808344. Its totient is φ = 529141824.

The previous prime is 679800427. The next prime is 679800481. The reversal of 679800445 is 544008976.

It can be written as a sum of positive squares in 4 ways, for example, as 330185241 + 349615204 = 18171^2 + 18698^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679800445 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837114 + ... + 1837483.

It is an arithmetic number, because the mean of its divisors is an integer number (104726043).

Almost surely, 2^679800445 is an apocalyptic number.

It is an amenable number.

679800445 is a deficient number, since it is larger than the sum of its proper divisors (158007899).

679800445 is a wasteful number, since it uses less digits than its factorization.

679800445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674639.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 679800445 is about 26072.9830475916. The cubic root of 679800445 is about 879.2799054916.

The spelling of 679800445 in words is "six hundred seventy-nine million, eight hundred thousand, four hundred forty-five".