680708531 has 2 divisors, whose sum is σ = 680708532. Its totient is φ = 680708530.

The previous prime is 680708519. The next prime is 680708551. The reversal of 680708531 is 135807086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680708531 - 2⁶ = 680708467 is a prime.

It is a super-2 number, since 2×680708531² = 926728208352355922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (680708551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340354265 + 340354266.

It is an arithmetic number, because the mean of its divisors is an integer number (340354266).

Almost surely, 2^680708531 is an apocalyptic number.

680708531 is a deficient number, since it is larger than the sum of its proper divisors (1).

680708531 is an equidigital number, since it uses as much as digits as its factorization.

680708531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 680708531 is about 26090.3915455480. The cubic root of 680708531 is about 879.6712490150.

The spelling of 680708531 in words is "six hundred eighty million, seven hundred eight thousand, five hundred thirty-one".