681410897 has 2 divisors, whose sum is σ = 681410898. Its totient is φ = 681410896.

The previous prime is 681410869. The next prime is 681410921. The reversal of 681410897 is 798014186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614841616 + 66569281 = 24796^2 + 8159^2 .

It is a cyclic number.

It is not a de Polignac number, because 681410897 - 2¹⁶ = 681345361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681410867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340705448 + 340705449.

It is an arithmetic number, because the mean of its divisors is an integer number (340705449).

Almost surely, 2^681410897 is an apocalyptic number.

It is an amenable number.

681410897 is a deficient number, since it is larger than the sum of its proper divisors (1).

681410897 is an equidigital number, since it uses as much as digits as its factorization.

681410897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 681410897 is about 26103.8483178247. The cubic root of 681410897 is about 879.9736979914.

The spelling of 681410897 in words is "six hundred eighty-one million, four hundred ten thousand, eight hundred ninety-seven".