680244497 has 2 divisors, whose sum is σ = 680244498. Its totient is φ = 680244496.

The previous prime is 680244473. The next prime is 680244541. The reversal of 680244497 is 794442086.

It is an a-pointer prime, because the next prime (680244541) can be obtained adding 680244497 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515789521 + 164454976 = 22711^2 + 12824^2 .

It is a cyclic number.

It is not a de Polignac number, because 680244497 - 2¹⁴ = 680228113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (680244427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340122248 + 340122249.

It is an arithmetic number, because the mean of its divisors is an integer number (340122249).

Almost surely, 2^680244497 is an apocalyptic number.

It is an amenable number.

680244497 is a deficient number, since it is larger than the sum of its proper divisors (1).

680244497 is an equidigital number, since it uses as much as digits as its factorization.

680244497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 680244497 is about 26081.4972154591. The cubic root of 680244497 is about 879.4713151030.

The spelling of 680244497 in words is "six hundred eighty million, two hundred forty-four thousand, four hundred ninety-seven".