680598901 has 2 divisors, whose sum is σ = 680598902. Its totient is φ = 680598900.

The previous prime is 680598889. The next prime is 680598907. The reversal of 680598901 is 109895086.

It is the 10651-st star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491508900 + 189090001 = 22170^2 + 13751^2 .

It is a cyclic number.

It is not a de Polignac number, because 680598901 - 2⁹ = 680598389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680598907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340299450 + 340299451.

It is an arithmetic number, because the mean of its divisors is an integer number (340299451).

Almost surely, 2^680598901 is an apocalyptic number.

It is an amenable number.

680598901 is a deficient number, since it is larger than the sum of its proper divisors (1).

680598901 is an equidigital number, since it uses as much as digits as its factorization.

680598901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 680598901 is about 26088.2904959294. The cubic root of 680598901 is about 879.6240219801.

The spelling of 680598901 in words is "six hundred eighty million, five hundred ninety-eight thousand, nine hundred one".