3811819 has 4 divisors (see below), whose sum is σ = 4158360. Its totient is φ = 3465280.

The previous prime is 3811817. The next prime is 3811877. The reversal of 3811819 is 9181183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9181183 = 11 ⋅834653.

It is a cyclic number.

It is not a de Polignac number, because 3811819 - 2¹ = 3811817 is a prime.

It is a super-2 number, since 2×3811819² = 29059928177522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3811817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173254 + ... + 173275.

It is an arithmetic number, because the mean of its divisors is an integer number (1039590).

Almost surely, 2^3811819 is an apocalyptic number.

3811819 is a deficient number, since it is larger than the sum of its proper divisors (346541).

3811819 is a wasteful number, since it uses less digits than its factorization.

3811819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346540.

The product of its digits is 1728, while the sum is 31.

The square root of 3811819 is about 1952.3880249582. The cubic root of 3811819 is about 156.2106921922.

The spelling of 3811819 in words is "three million, eight hundred eleven thousand, eight hundred nineteen".