3838621 has 2 divisors, whose sum is σ = 3838622. Its totient is φ = 3838620.

The previous prime is 3838619. The next prime is 3838657. The reversal of 3838621 is 1268383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3667225 + 171396 = 1915^2 + 414^2 .

It is a cyclic number.

It is not a de Polignac number, because 3838621 - 2¹ = 3838619 is a prime.

It is a super-2 number, since 2×3838621² = 29470022363282, which contains 22 as substring.

Together with 3838619, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 3⁵ + 8³ + 3¹⁰ + 8⁷ + 6⁸ + 2¹¹ + 1 .

3838621 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3838661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1919310 + 1919311.

It is an arithmetic number, because the mean of its divisors is an integer number (1919311).

Almost surely, 2^3838621 is an apocalyptic number.

It is an amenable number.

3838621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3838621 is an equidigital number, since it uses as much as digits as its factorization.

3838621 is an evil number, because the sum of its binary digits is even.

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

The square root of 3838621 is about 1959.2399036361. The cubic root of 3838621 is about 156.5759582549.

The spelling of 3838621 in words is "three million, eight hundred thirty-eight thousand, six hundred twenty-one".