680489633 has 2 divisors, whose sum is σ = 680489634. Its totient is φ = 680489632.

The previous prime is 680489627. The next prime is 680489659. The reversal of 680489633 is 336984086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639938209 + 40551424 = 25297^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 680489633 - 2¹⁶ = 680424097 is a prime.

It is a super-2 number, since 2×680489633² = 926132281240949378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (680489683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340244816 + 340244817.

It is an arithmetic number, because the mean of its divisors is an integer number (340244817).

Almost surely, 2^680489633 is an apocalyptic number.

It is an amenable number.

680489633 is a deficient number, since it is larger than the sum of its proper divisors (1).

680489633 is an equidigital number, since it uses as much as digits as its factorization.

680489633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 680489633 is about 26086.1962156233. The cubic root of 680489633 is about 879.5769458429.

The spelling of 680489633 in words is "six hundred eighty million, four hundred eighty-nine thousand, six hundred thirty-three".