3881431 has 2 divisors, whose sum is σ = 3881432. Its totient is φ = 3881430.

The previous prime is 3881419. The next prime is 3881441. The reversal of 3881431 is 1341883.

It is a strong prime.

It is an emirp because it is prime and its reverse (1341883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3881431 - 2⁷ = 3881303 is a prime.

It is a super-2 number, since 2×3881431² = 30131013215522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3881431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3881441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940715 + 1940716.

It is an arithmetic number, because the mean of its divisors is an integer number (1940716).

Almost surely, 2^3881431 is an apocalyptic number.

3881431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881431 is an equidigital number, since it uses as much as digits as its factorization.

3881431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 3881431 is about 1970.1347669639. The cubic root of 3881431 is about 157.1558758596.

The spelling of 3881431 in words is "three million, eight hundred eighty-one thousand, four hundred thirty-one".