681110033 has 2 divisors, whose sum is σ = 681110034. Its totient is φ = 681110032.

The previous prime is 681109939. The next prime is 681110039. The reversal of 681110033 is 330011186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515653264 + 165456769 = 22708^2 + 12863^2 .

It is a cyclic number.

It is not a de Polignac number, because 681110033 - 2¹⁴ = 681093649 is a prime.

It is a super-2 number, since 2×681110033² = 927821754106522178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681109990 and 681110008.

It is not a weakly prime, because it can be changed into another prime (681110039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340555016 + 340555017.

It is an arithmetic number, because the mean of its divisors is an integer number (340555017).

Almost surely, 2^681110033 is an apocalyptic number.

It is an amenable number.

681110033 is a deficient number, since it is larger than the sum of its proper divisors (1).

681110033 is an equidigital number, since it uses as much as digits as its factorization.

681110033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 681110033 is about 26098.0848531075. The cubic root of 681110033 is about 879.8441670516.

The spelling of 681110033 in words is "six hundred eighty-one million, one hundred ten thousand, thirty-three".