680064289 has 2 divisors, whose sum is σ = 680064290. Its totient is φ = 680064288.

The previous prime is 680064191. The next prime is 680064313. The reversal of 680064289 is 982460086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587577600 + 92486689 = 24240^2 + 9617^2 .

It is a cyclic number.

It is not a de Polignac number, because 680064289 - 2⁹ = 680063777 is a prime.

It is not a weakly prime, because it can be changed into another prime (680064689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340032144 + 340032145.

It is an arithmetic number, because the mean of its divisors is an integer number (340032145).

Almost surely, 2^680064289 is an apocalyptic number.

It is an amenable number.

680064289 is a deficient number, since it is larger than the sum of its proper divisors (1).

680064289 is an equidigital number, since it uses as much as digits as its factorization.

680064289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 680064289 is about 26078.0422769808. The cubic root of 680064289 is about 879.3936460861.

The spelling of 680064289 in words is "six hundred eighty million, sixty-four thousand, two hundred eighty-nine".