3872597681 has 2 divisors, whose sum is σ = 3872597682. Its totient is φ = 3872597680.

The previous prime is 3872597657. The next prime is 3872597747. The reversal of 3872597681 is 1867952783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3463911025 + 408686656 = 58855^2 + 20216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3872597681 is a prime.

It is a super-2 number, since 2×3872597681² = 29994025597773155522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3872597581) 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, 1936298840 + 1936298841.

It is an arithmetic number, because the mean of its divisors is an integer number (1936298841).

Almost surely, 2^3872597681 is an apocalyptic number.

It is an amenable number.

3872597681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3872597681 is an equidigital number, since it uses as much as digits as its factorization.

3872597681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 56.

The square root of 3872597681 is about 62230.1991078287. The cubic root of 3872597681 is about 1570.3656742182.

The spelling of 3872597681 in words is "three billion, eight hundred seventy-two million, five hundred ninety-seven thousand, six hundred eighty-one".