3881791 has 4 divisors (see below), whose sum is σ = 3888472. Its totient is φ = 3875112.

The previous prime is 3881743. The next prime is 3881803. The reversal of 3881791 is 1971883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1971883 = 71 ⋅27773.

It is a cyclic number.

It is not a de Polignac number, because 3881791 - 2¹⁵ = 3849023 is a prime.

It is a Duffinian number.

3881791 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3881791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881711) 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, 2376 + ... + 3661.

It is an arithmetic number, because the mean of its divisors is an integer number (972118).

Almost surely, 2^3881791 is an apocalyptic number.

3881791 is a deficient number, since it is larger than the sum of its proper divisors (6681).

3881791 is an equidigital number, since it uses as much as digits as its factorization.

3881791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680.

The product of its digits is 12096, while the sum is 37.

The square root of 3881791 is about 1970.2261291537. The cubic root of 3881791 is about 157.1607344085.

The spelling of 3881791 in words is "three million, eight hundred eighty-one thousand, seven hundred ninety-one".