679083521 has 2 divisors, whose sum is σ = 679083522. Its totient is φ = 679083520.

The previous prime is 679083497. The next prime is 679083529. The reversal of 679083521 is 125380976.

679083521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580279921 + 98803600 = 24089^2 + 9940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679083521 is a prime.

It is a super-2 number, since 2×679083521² = 922308856987514882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679083529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339541760 + 339541761.

It is an arithmetic number, because the mean of its divisors is an integer number (339541761).

Almost surely, 2^679083521 is an apocalyptic number.

It is an amenable number.

679083521 is a deficient number, since it is larger than the sum of its proper divisors (1).

679083521 is an equidigital number, since it uses as much as digits as its factorization.

679083521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 679083521 is about 26059.2310132130. The cubic root of 679083521 is about 878.9706977910.

The spelling of 679083521 in words is "six hundred seventy-nine million, eighty-three thousand, five hundred twenty-one".