681755363 has 2 divisors, whose sum is σ = 681755364. Its totient is φ = 681755362.

The previous prime is 681755297. The next prime is 681755383. The reversal of 681755363 is 363557186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681755363 - 2¹⁴ = 681738979 is a prime.

It is not a weakly prime, because it can be changed into another prime (681755383) 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, 340877681 + 340877682.

It is an arithmetic number, because the mean of its divisors is an integer number (340877682).

Almost surely, 2^681755363 is an apocalyptic number.

681755363 is a deficient number, since it is larger than the sum of its proper divisors (1).

681755363 is an equidigital number, since it uses as much as digits as its factorization.

681755363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The square root of 681755363 is about 26110.4454768585. The cubic root of 681755363 is about 880.1219540866.

The spelling of 681755363 in words is "six hundred eighty-one million, seven hundred fifty-five thousand, three hundred sixty-three".