681486823 has 2 divisors, whose sum is σ = 681486824. Its totient is φ = 681486822.

The previous prime is 681486811. The next prime is 681486853. The reversal of 681486823 is 328684186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681486823 - 2¹³ = 681478631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681486853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340743411 + 340743412.

It is an arithmetic number, because the mean of its divisors is an integer number (340743412).

Almost surely, 2^681486823 is an apocalyptic number.

681486823 is a deficient number, since it is larger than the sum of its proper divisors (1).

681486823 is an equidigital number, since it uses as much as digits as its factorization.

681486823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 46.

The square root of 681486823 is about 26105.3025839579. The cubic root of 681486823 is about 880.0063803773.

The spelling of 681486823 in words is "six hundred eighty-one million, four hundred eighty-six thousand, eight hundred twenty-three".