680814737 has 2 divisors, whose sum is σ = 680814738. Its totient is φ = 680814736.

The previous prime is 680814731. The next prime is 680814767. The reversal of 680814737 is 737418086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408201616 + 272613121 = 20204^2 + 16511^2 .

It is a cyclic number.

It is not a de Polignac number, because 680814737 - 2¹⁰ = 680813713 is a prime.

It is a super-2 number, since 2×680814737² = 927017412232758338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (680814731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340407368 + 340407369.

It is an arithmetic number, because the mean of its divisors is an integer number (340407369).

Almost surely, 2^680814737 is an apocalyptic number.

It is an amenable number.

680814737 is a deficient number, since it is larger than the sum of its proper divisors (1).

680814737 is an equidigital number, since it uses as much as digits as its factorization.

680814737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 680814737 is about 26092.4268131579. The cubic root of 680814737 is about 879.7169962044.

The spelling of 680814737 in words is "six hundred eighty million, eight hundred fourteen thousand, seven hundred thirty-seven".