3368821 has 4 divisors (see below), whose sum is σ = 3401632. Its totient is φ = 3336012.

The previous prime is 3368809. The next prime is 3368837. The reversal of 3368821 is 1288633.

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: 1288633 = 103 ⋅12511.

It is a cyclic number.

It is not a de Polignac number, because 3368821 - 2⁵ = 3368789 is a prime.

It is a super-2 number, since 2×3368821² = 22697909860082, which contains 22 as substring.

It is a Duffinian number.

3368821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3368851) 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, 16251 + ... + 16456.

It is an arithmetic number, because the mean of its divisors is an integer number (850408).

Almost surely, 2^3368821 is an apocalyptic number.

It is an amenable number.

3368821 is a deficient number, since it is larger than the sum of its proper divisors (32811).

3368821 is a wasteful number, since it uses less digits than its factorization.

3368821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32810.

The product of its digits is 6912, while the sum is 31.

The square root of 3368821 is about 1835.4348258655. The cubic root of 3368821 is about 149.9084033377.

Adding to 3368821 its product of digits (6912), we get a palindrome (3375733).

The spelling of 3368821 in words is "three million, three hundred sixty-eight thousand, eight hundred twenty-one".