679561 has 2 divisors, whose sum is σ = 679562. Its totient is φ = 679560.

The previous prime is 679537. The next prime is 679597. The reversal of 679561 is 165976.

679561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553536 + 126025 = 744^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 679561 - 2⁷ = 679433 is a prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (679501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339780 + 339781.

It is an arithmetic number, because the mean of its divisors is an integer number (339781).

2⁶⁷⁹⁵⁶¹ is an apocalyptic number.

It is an amenable number.

679561 is a deficient number, since it is larger than the sum of its proper divisors (1).

679561 is an equidigital number, since it uses as much as digits as its factorization.

679561 is an evil number, because the sum of its binary digits is even.

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

The square root of 679561 is about 824.3548993001. The cubic root of 679561 is about 87.9176657594.

The spelling of 679561 in words is "six hundred seventy-nine thousand, five hundred sixty-one".