681203273 has 2 divisors, whose sum is σ = 681203274. Its totient is φ = 681203272.

The previous prime is 681203251. The next prime is 681203279. The reversal of 681203273 is 372302186.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665227264 + 15976009 = 25792^2 + 3997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681203273 is a prime.

It is not a weakly prime, because it can be changed into another prime (681203279) 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, 340601636 + 340601637.

It is an arithmetic number, because the mean of its divisors is an integer number (340601637).

Almost surely, 2^681203273 is an apocalyptic number.

It is an amenable number.

681203273 is a deficient number, since it is larger than the sum of its proper divisors (1).

681203273 is an equidigital number, since it uses as much as digits as its factorization.

681203273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 681203273 is about 26099.8711299500. The cubic root of 681203273 is about 879.8843137352.

The spelling of 681203273 in words is "six hundred eighty-one million, two hundred three thousand, two hundred seventy-three".