3988531 has 2 divisors, whose sum is σ = 3988532. Its totient is φ = 3988530.

The previous prime is 3988519. The next prime is 3988541. The reversal of 3988531 is 1358893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3988531 - 2⁷ = 3988403 is a prime.

It is a super-2 number, since 2×3988531² = 31816759075922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3988541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994265 + 1994266.

It is an arithmetic number, because the mean of its divisors is an integer number (1994266).

Almost surely, 2^3988531 is an apocalyptic number.

3988531 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988531 is an equidigital number, since it uses as much as digits as its factorization.

3988531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 3988531 is about 1997.1306917676. The cubic root of 3988531 is about 158.5882441074.

The spelling of 3988531 in words is "three million, nine hundred eighty-eight thousand, five hundred thirty-one".