3923989 has 4 divisors (see below), whose sum is σ = 3982624. Its totient is φ = 3865356.

The previous prime is 3923981. The next prime is 3923993. The reversal of 3923989 is 9893293.

It is a happy number.

3923989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 3923989 - 2³ = 3923981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3923981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29217 + ... + 29350.

It is an arithmetic number, because the mean of its divisors is an integer number (995656).

Almost surely, 2^3923989 is an apocalyptic number.

It is an amenable number.

3923989 is a deficient number, since it is larger than the sum of its proper divisors (58635).

3923989 is an equidigital number, since it uses as much as digits as its factorization.

3923989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58634.

The product of its digits is 104976, while the sum is 43.

The square root of 3923989 is about 1980.9061058011. The cubic root of 3923989 is about 157.7281684974.

The spelling of 3923989 in words is "three million, nine hundred twenty-three thousand, nine hundred eighty-nine".