1697000681 has 2 divisors, whose sum is σ = 1697000682. Its totient is φ = 1697000680.

The previous prime is 1697000677. The next prime is 1697000689. The reversal of 1697000681 is 1860007961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1438305625 + 258695056 = 37925^2 + 16084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1697000681 - 2² = 1697000677 is a prime.

It is a super-2 number, since 2×1697000681² = 5759622622628927522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1697000689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848500340 + 848500341.

It is an arithmetic number, because the mean of its divisors is an integer number (848500341).

Almost surely, 2^1697000681 is an apocalyptic number.

It is an amenable number.

1697000681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697000681 is an equidigital number, since it uses as much as digits as its factorization.

1697000681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1697000681 is about 41194.6681137256. The cubic root of 1697000681 is about 1192.7808891684.

The spelling of 1697000681 in words is "one billion, six hundred ninety-seven million, six hundred eighty-one", and thus it is an aban number.