3933889 has 4 divisors (see below), whose sum is σ = 3978180. Its totient is φ = 3889600.

The previous prime is 3933887. The next prime is 3933901. The reversal of 3933889 is 9883393.

3933889 = 51² + 52² + ... + 228².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9883393 = 13 ⋅760261.

It can be written as a sum of positive squares in 2 ways, for example, as 693889 + 3240000 = 833^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 3933889 - 2¹ = 3933887 is a prime.

It is a Duffinian number.

3933889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3933887) 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, 22012 + ... + 22189.

It is an arithmetic number, because the mean of its divisors is an integer number (994545).

Almost surely, 2^3933889 is an apocalyptic number.

It is an amenable number.

3933889 is a deficient number, since it is larger than the sum of its proper divisors (44291).

3933889 is an equidigital number, since it uses as much as digits as its factorization.

3933889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44290.

The product of its digits is 139968, while the sum is 43.

The square root of 3933889 is about 1983.4033881185. The cubic root of 3933889 is about 157.8607034855.

The spelling of 3933889 in words is "three million, nine hundred thirty-three thousand, eight hundred eighty-nine".