680899213 has 2 divisors, whose sum is σ = 680899214. Its totient is φ = 680899212.

The previous prime is 680899187. The next prime is 680899223. The reversal of 680899213 is 312998086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555167844 + 125731369 = 23562^2 + 11213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680899213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680899223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340449606 + 340449607.

It is an arithmetic number, because the mean of its divisors is an integer number (340449607).

Almost surely, 2^680899213 is an apocalyptic number.

It is an amenable number.

680899213 is a deficient number, since it is larger than the sum of its proper divisors (1).

680899213 is an equidigital number, since it uses as much as digits as its factorization.

680899213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 680899213 is about 26094.0455468293. The cubic root of 680899213 is about 879.7533800131.

The spelling of 680899213 in words is "six hundred eighty million, eight hundred ninety-nine thousand, two hundred thirteen".