681437303 has 2 divisors, whose sum is σ = 681437304. Its totient is φ = 681437302.

The previous prime is 681437287. The next prime is 681437327. The reversal of 681437303 is 303734186.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681437303 - 2⁴ = 681437287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681437903) 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, 340718651 + 340718652.

It is an arithmetic number, because the mean of its divisors is an integer number (340718652).

Almost surely, 2^681437303 is an apocalyptic number.

681437303 is a deficient number, since it is larger than the sum of its proper divisors (1).

681437303 is an equidigital number, since it uses as much as digits as its factorization.

681437303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 681437303 is about 26104.3541004178. The cubic root of 681437303 is about 879.9850647431.

The spelling of 681437303 in words is "six hundred eighty-one million, four hundred thirty-seven thousand, three hundred three".