3197461681 has 2 divisors, whose sum is σ = 3197461682. Its totient is φ = 3197461680.

The previous prime is 3197461661. The next prime is 3197461723. The reversal of 3197461681 is 1861647913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2229256225 + 968205456 = 47215^2 + 31116^2 .

It is an emirp because it is prime and its reverse (1861647913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3197461681 - 2⁵ = 3197461649 is a prime.

It is a super-2 number, since 2×3197461681² = 20447522402926691522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3197461661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1598730840 + 1598730841.

It is an arithmetic number, because the mean of its divisors is an integer number (1598730841).

Almost surely, 2^3197461681 is an apocalyptic number.

It is an amenable number.

3197461681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3197461681 is an equidigital number, since it uses as much as digits as its factorization.

3197461681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 3197461681 is about 56546.1022617828. The cubic root of 3197461681 is about 1473.2228610901. Note that the first 3 decimals are identical.

The spelling of 3197461681 in words is "three billion, one hundred ninety-seven million, four hundred sixty-one thousand, six hundred eighty-one".