680754081389 has 2 divisors, whose sum is σ = 680754081390. Its totient is φ = 680754081388.

The previous prime is 680754081383. The next prime is 680754081431. The reversal of 680754081389 is 983180457086.

It is a happy number.

680754081389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641027612164 + 39726469225 = 800642^2 + 199315^2 .

It is a cyclic number.

It is not a de Polignac number, because 680754081389 - 2¹² = 680754077293 is a prime.

It is a super-2 number, since 2×680754081389² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680754081383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340377040694 + 340377040695.

It is an arithmetic number, because the mean of its divisors is an integer number (340377040695).

Almost surely, 2^680754081389 is an apocalyptic number.

It is an amenable number.

680754081389 is a deficient number, since it is larger than the sum of its proper divisors (1).

680754081389 is an equidigital number, since it uses as much as digits as its factorization.

680754081389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 680754081389 in words is "six hundred eighty billion, seven hundred fifty-four million, eighty-one thousand, three hundred eighty-nine".