3853981 has 4 divisors (see below), whose sum is σ = 3863200. Its totient is φ = 3844764.

The previous prime is 3853943. The next prime is 3853991. The reversal of 3853981 is 1893583.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1893583 = 47 ⋅40289.

It is a cyclic number.

It is not a de Polignac number, because 3853981 - 2⁷ = 3853853 is a prime.

It is a super-2 number, since 2×3853981² = 29706339096722, 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 3853981.

It is a congruent number.

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, 3951 + ... + 4828.

It is an arithmetic number, because the mean of its divisors is an integer number (965800).

Almost surely, 2^3853981 is an apocalyptic number.

It is an amenable number.

3853981 is a deficient number, since it is larger than the sum of its proper divisors (9219).

3853981 is an equidigital number, since it uses as much as digits as its factorization.

3853981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9218.

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

The square root of 3853981 is about 1963.1558776623. The cubic root of 3853981 is about 156.7845232581.

The spelling of 3853981 in words is "three million, eight hundred fifty-three thousand, nine hundred eighty-one".