680999933 has 2 divisors, whose sum is σ = 680999934. Its totient is φ = 680999932.

The previous prime is 680999929. The next prime is 680999947. The reversal of 680999933 is 339999086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443439364 + 237560569 = 21058^2 + 15413^2 .

It is a cyclic number.

It is not a de Polignac number, because 680999933 - 2² = 680999929 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680999983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340499966 + 340499967.

It is an arithmetic number, because the mean of its divisors is an integer number (340499967).

Almost surely, 2^680999933 is an apocalyptic number.

It is an amenable number.

680999933 is a deficient number, since it is larger than the sum of its proper divisors (1).

680999933 is an equidigital number, since it uses as much as digits as its factorization.

680999933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The square root of 680999933 is about 26095.9754176770. The cubic root of 680999933 is about 879.7967561790.

The spelling of 680999933 in words is "six hundred eighty million, nine hundred ninety-nine thousand, nine hundred thirty-three".