680282881 has 2 divisors, whose sum is σ = 680282882. Its totient is φ = 680282880.

The previous prime is 680282809. The next prime is 680282887. The reversal of 680282881 is 188282086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493550656 + 186732225 = 22216^2 + 13665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680282881 is a prime.

It is a super-2 number, since 2×680282881² = 925569596363320322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (680282887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340141440 + 340141441.

It is an arithmetic number, because the mean of its divisors is an integer number (340141441).

Almost surely, 2^680282881 is an apocalyptic number.

It is an amenable number.

680282881 is a deficient number, since it is larger than the sum of its proper divisors (1).

680282881 is an equidigital number, since it uses as much as digits as its factorization.

680282881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98304, while the sum is 43.

The square root of 680282881 is about 26082.2330524056. The cubic root of 680282881 is about 879.4878567006.

The spelling of 680282881 in words is "six hundred eighty million, two hundred eighty-two thousand, eight hundred eighty-one".