680398027 has 2 divisors, whose sum is σ = 680398028. Its totient is φ = 680398026.

The previous prime is 680397959. The next prime is 680398049. The reversal of 680398027 is 720893086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680398027 is a prime.

It is a super-3 number, since 3×680398027³ (a number of 27 digits) contains 333 as substring.

It is equal to p_35289655 and since 680398027 and 35289655 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (680398067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340199013 + 340199014.

It is an arithmetic number, because the mean of its divisors is an integer number (340199014).

Almost surely, 2^680398027 is an apocalyptic number.

680398027 is a deficient number, since it is larger than the sum of its proper divisors (1).

680398027 is an equidigital number, since it uses as much as digits as its factorization.

680398027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 680398027 is about 26084.4403236872. The cubic root of 680398027 is about 879.5374751747.

The spelling of 680398027 in words is "six hundred eighty million, three hundred ninety-eight thousand, twenty-seven".