3997017281 has 2 divisors, whose sum is σ = 3997017282. Its totient is φ = 3997017280.

The previous prime is 3997017259. The next prime is 3997017319. The reversal of 3997017281 is 1827107993.

3997017281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3151138225 + 845879056 = 56135^2 + 29084^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997017281 - 2⁶ = 3997017217 is a prime.

It is a super-2 number, since 2×3997017281² = 31952294289225265922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3997007281) 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, 1998508640 + 1998508641.

It is an arithmetic number, because the mean of its divisors is an integer number (1998508641).

Almost surely, 2^3997017281 is an apocalyptic number.

It is an amenable number.

3997017281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3997017281 is an equidigital number, since it uses as much as digits as its factorization.

3997017281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 3997017281 is about 63221.9683417086. The cubic root of 3997017281 is about 1587.0063895815.

The spelling of 3997017281 in words is "three billion, nine hundred ninety-seven million, seventeen thousand, two hundred eighty-one".