681583351 has 2 divisors, whose sum is σ = 681583352. Its totient is φ = 681583350.

The previous prime is 681583349. The next prime is 681583373. The reversal of 681583351 is 153385186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681583351 - 2¹ = 681583349 is a prime.

Together with 681583349, 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 (681583321) 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, 340791675 + 340791676.

It is an arithmetic number, because the mean of its divisors is an integer number (340791676).

Almost surely, 2^681583351 is an apocalyptic number.

681583351 is a deficient number, since it is larger than the sum of its proper divisors (1).

681583351 is an equidigital number, since it uses as much as digits as its factorization.

681583351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 40.

The square root of 681583351 is about 26107.1513382828. The cubic root of 681583351 is about 880.0479274000.

The spelling of 681583351 in words is "six hundred eighty-one million, five hundred eighty-three thousand, three hundred fifty-one".