679447541 has 2 divisors, whose sum is σ = 679447542. Its totient is φ = 679447540.

The previous prime is 679447523. The next prime is 679447631. The reversal of 679447541 is 145744976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394816900 + 284630641 = 19870^2 + 16871^2 .

It is a cyclic number.

It is not a de Polignac number, because 679447541 - 2⁶ = 679447477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679447511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339723770 + 339723771.

It is an arithmetic number, because the mean of its divisors is an integer number (339723771).

Almost surely, 2^679447541 is an apocalyptic number.

It is an amenable number.

679447541 is a deficient number, since it is larger than the sum of its proper divisors (1).

679447541 is an equidigital number, since it uses as much as digits as its factorization.

679447541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 679447541 is about 26066.2145506401. The cubic root of 679447541 is about 879.1277259763.

The spelling of 679447541 in words is "six hundred seventy-nine million, four hundred forty-seven thousand, five hundred forty-one".