680971 has 2 divisors, whose sum is σ = 680972. Its totient is φ = 680970.

The previous prime is 680959. The next prime is 680987. The reversal of 680971 is 179086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680971 - 2¹³ = 672779 is a prime.

It is a Chen prime.

680971 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (681971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340485 + 340486.

It is an arithmetic number, because the mean of its divisors is an integer number (340486).

2⁶⁸⁰⁹⁷¹ is an apocalyptic number.

680971 is a deficient number, since it is larger than the sum of its proper divisors (1).

680971 is an equidigital number, since it uses as much as digits as its factorization.

680971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 680971 is about 825.2096703263. The cubic root of 680971 is about 87.9784296305.

The spelling of 680971 in words is "six hundred eighty thousand, nine hundred seventy-one".