680804023 has 2 divisors, whose sum is σ = 680804024. Its totient is φ = 680804022.

The previous prime is 680804021. The next prime is 680804041. The reversal of 680804023 is 320408086.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680804023 - 2¹ = 680804021 is a prime.

Together with 680804021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680804021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340402011 + 340402012.

It is an arithmetic number, because the mean of its divisors is an integer number (340402012).

Almost surely, 2^680804023 is an apocalyptic number.

680804023 is a deficient number, since it is larger than the sum of its proper divisors (1).

680804023 is an equidigital number, since it uses as much as digits as its factorization.

680804023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 680804023 is about 26092.2215037356. The cubic root of 680804023 is about 879.7123814701.

The spelling of 680804023 in words is "six hundred eighty million, eight hundred four thousand, twenty-three".