3812891 has 4 divisors (see below), whose sum is σ = 3944400. Its totient is φ = 3681384.

The previous prime is 3812843. The next prime is 3812899. The reversal of 3812891 is 1982183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3812891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3812899) 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, 65711 + ... + 65768.

It is an arithmetic number, because the mean of its divisors is an integer number (986100).

Almost surely, 2^3812891 is an apocalyptic number.

3812891 is a deficient number, since it is larger than the sum of its proper divisors (131509).

3812891 is a wasteful number, since it uses less digits than its factorization.

3812891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131508.

The product of its digits is 3456, while the sum is 32.

The square root of 3812891 is about 1952.6625412498. The cubic root of 3812891 is about 156.2253345599.

The spelling of 3812891 in words is "three million, eight hundred twelve thousand, eight hundred ninety-one".