680456797 has 2 divisors, whose sum is σ = 680456798. Its totient is φ = 680456796.

The previous prime is 680456767. The next prime is 680456839. The reversal of 680456797 is 797654086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648262521 + 32194276 = 25461^2 + 5674^2 .

It is a cyclic number.

It is not a de Polignac number, because 680456797 - 2²⁷ = 546239069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680456717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340228398 + 340228399.

It is an arithmetic number, because the mean of its divisors is an integer number (340228399).

Almost surely, 2^680456797 is an apocalyptic number.

It is an amenable number.

680456797 is a deficient number, since it is larger than the sum of its proper divisors (1).

680456797 is an equidigital number, since it uses as much as digits as its factorization.

680456797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 680456797 is about 26085.5668330209. The cubic root of 680456797 is about 879.5627980627.

The spelling of 680456797 in words is "six hundred eighty million, four hundred fifty-six thousand, seven hundred ninety-seven".