3881869 has 2 divisors, whose sum is σ = 3881870. Its totient is φ = 3881868.

The previous prime is 3881863. The next prime is 3881873. The reversal of 3881869 is 9681883.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3755844 + 126025 = 1938^2 + 355^2 .

It is an emirp because it is prime and its reverse (9681883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3881869 - 2⁵ = 3881837 is a prime.

It is a super-2 number, since 2×3881869² = 30137813866322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3881863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940934 + 1940935.

It is an arithmetic number, because the mean of its divisors is an integer number (1940935).

Almost surely, 2^3881869 is an apocalyptic number.

It is an amenable number.

3881869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881869 is an equidigital number, since it uses as much as digits as its factorization.

3881869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 3881869 is about 1970.2459237364. The cubic root of 3881869 is about 157.1617870545.

The spelling of 3881869 in words is "three million, eight hundred eighty-one thousand, eight hundred sixty-nine".