3821313 has 4 divisors (see below), whose sum is σ = 5095088. Its totient is φ = 2547540.

The previous prime is 3821273. The next prime is 3821317. The reversal of 3821313 is 3131283.

It is a happy number.

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: 3131283 = 3 ⋅1043761.

It is not a de Polignac number, because 3821313 - 2⁸ = 3821057 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

3821313 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3821313.

It is not an unprimeable number, because it can be changed into a prime (3821317) 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, 636883 + ... + 636888.

It is an arithmetic number, because the mean of its divisors is an integer number (1273772).

Almost surely, 2^3821313 is an apocalyptic number.

It is an amenable number.

3821313 is a deficient number, since it is larger than the sum of its proper divisors (1273775).

3821313 is a wasteful number, since it uses less digits than its factorization.

3821313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273774.

The product of its digits is 432, while the sum is 21.

The square root of 3821313 is about 1954.8178943318. The cubic root of 3821313 is about 156.3402746597.

Adding to 3821313 its reverse (3131283), we get a palindrome (6952596).

It can be divided in two parts, 38213 and 13, that added together give a triangular number (38226 = T₂₇₆).

The spelling of 3821313 in words is "three million, eight hundred twenty-one thousand, three hundred thirteen".