3853891 has 4 divisors (see below), whose sum is σ = 3868384. Its totient is φ = 3839400.

The previous prime is 3853873. The next prime is 3853909. The reversal of 3853891 is 1983583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983583 = 7 ⋅283369.

It is an interprime number because it is at equal distance from previous prime (3853873) and next prime (3853909).

It is a cyclic number.

It is not a de Polignac number, because 3853891 - 2⁷ = 3853763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3853891.

It is not an unprimeable number, because it can be changed into a prime (3853991) 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, 6840 + ... + 7381.

It is an arithmetic number, because the mean of its divisors is an integer number (967096).

Almost surely, 2^3853891 is an apocalyptic number.

3853891 is a deficient number, since it is larger than the sum of its proper divisors (14493).

3853891 is a wasteful number, since it uses less digits than its factorization.

3853891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14492.

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

The square root of 3853891 is about 1963.1329552529. The cubic root of 3853891 is about 156.7833028130.

The spelling of 3853891 in words is "three million, eight hundred fifty-three thousand, eight hundred ninety-one".