679435457 has 2 divisors, whose sum is σ = 679435458. Its totient is φ = 679435456.

The previous prime is 679435451. The next prime is 679435501. The reversal of 679435457 is 754534976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409293361 + 270142096 = 20231^2 + 16436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679435457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679435451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339717728 + 339717729.

It is an arithmetic number, because the mean of its divisors is an integer number (339717729).

Almost surely, 2^679435457 is an apocalyptic number.

It is an amenable number.

679435457 is a deficient number, since it is larger than the sum of its proper divisors (1).

679435457 is an equidigital number, since it uses as much as digits as its factorization.

679435457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 50.

The square root of 679435457 is about 26065.9827553077. The cubic root of 679435457 is about 879.1225141722.

The spelling of 679435457 in words is "six hundred seventy-nine million, four hundred thirty-five thousand, four hundred fifty-seven".