3997365131 has 2 divisors, whose sum is σ = 3997365132. Its totient is φ = 3997365130.

The previous prime is 3997365121. The next prime is 3997365139. The reversal of 3997365131 is 1315637993.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1315637993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3997365131 is a prime.

It is a super-2 number, since 2×3997365131² = 31957855981069294322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3997365139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998682565 + 1998682566.

It is an arithmetic number, because the mean of its divisors is an integer number (1998682566).

Almost surely, 2^3997365131 is an apocalyptic number.

3997365131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3997365131 is an equidigital number, since it uses as much as digits as its factorization.

3997365131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 47.

The square root of 3997365131 is about 63224.7193034497. The cubic root of 3997365131 is about 1587.0524259231.

The spelling of 3997365131 in words is "three billion, nine hundred ninety-seven million, three hundred sixty-five thousand, one hundred thirty-one".