679752709 has 2 divisors, whose sum is σ = 679752710. Its totient is φ = 679752708.

The previous prime is 679752659. The next prime is 679752739. The reversal of 679752709 is 907257976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677144484 + 2608225 = 26022^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 679752709 - 2¹³ = 679744517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679752739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339876354 + 339876355.

It is an arithmetic number, because the mean of its divisors is an integer number (339876355).

Almost surely, 2^679752709 is an apocalyptic number.

It is an amenable number.

679752709 is a deficient number, since it is larger than the sum of its proper divisors (1).

679752709 is an equidigital number, since it uses as much as digits as its factorization.

679752709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1666980, while the sum is 52.

The square root of 679752709 is about 26072.0676011704. The cubic root of 679752709 is about 879.2593238202.

The spelling of 679752709 in words is "six hundred seventy-nine million, seven hundred fifty-two thousand, seven hundred nine".