679000561 has 2 divisors, whose sum is σ = 679000562. Its totient is φ = 679000560.

The previous prime is 679000523. The next prime is 679000571. The reversal of 679000561 is 165000976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 561690000 + 117310561 = 23700^2 + 10831^2 .

It is a cyclic number.

It is not a de Polignac number, because 679000561 - 2¹⁷ = 678869489 is a prime.

It is a super-2 number, since 2×679000561² = 922083523676629442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (679000571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339500280 + 339500281.

It is an arithmetic number, because the mean of its divisors is an integer number (339500281).

Almost surely, 2^679000561 is an apocalyptic number.

It is an amenable number.

679000561 is a deficient number, since it is larger than the sum of its proper divisors (1).

679000561 is an equidigital number, since it uses as much as digits as its factorization.

679000561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 679000561 is about 26057.6392061906. The cubic root of 679000561 is about 878.9349032844.

The spelling of 679000561 in words is "six hundred seventy-nine million, five hundred sixty-one", and thus it is an aban number.