679894641 has 10 divisors (see below), whose sum is σ = 1015645202. Its totient is φ = 453263040.

The previous prime is 679894601. The next prime is 679894643. The reversal of 679894641 is 146498976.

It can be written as a sum of positive squares in only one way, i.e., 617025600 + 62869041 = 24840^2 + 7929^2 .

It is not a de Polignac number, because 679894641 - 2⁶ = 679894577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679894643) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4196800 + ... + 4196961.

Almost surely, 2^679894641 is an apocalyptic number.

It is an amenable number.

679894641 is a deficient number, since it is larger than the sum of its proper divisors (335750561).

679894641 is an equidigital number, since it uses as much as digits as its factorization.

679894641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393773 (or 8393764 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 679894641 is about 26074.7893759470. The cubic root of 679894641 is about 879.3205158528.

The spelling of 679894641 in words is "six hundred seventy-nine million, eight hundred ninety-four thousand, six hundred forty-one".