3881689 has 4 divisors (see below), whose sum is σ = 4436224. Its totient is φ = 3327156.

The previous prime is 3881671. The next prime is 3881699. The reversal of 3881689 is 9861883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3881689 - 2⁹ = 3881177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3881609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277257 + ... + 277270.

It is an arithmetic number, because the mean of its divisors is an integer number (1109056).

Almost surely, 2^3881689 is an apocalyptic number.

It is an amenable number.

3881689 is a deficient number, since it is larger than the sum of its proper divisors (554535).

3881689 is an equidigital number, since it uses as much as digits as its factorization.

3881689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554534.

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

The square root of 3881689 is about 1970.2002436301. The cubic root of 3881689 is about 157.1593578501.

The spelling of 3881689 in words is "three million, eight hundred eighty-one thousand, six hundred eighty-nine".