3929889 has 4 divisors (see below), whose sum is σ = 5239856. Its totient is φ = 2619924.

The previous prime is 3929879. The next prime is 3929917. The reversal of 3929889 is 9889293.

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 not a de Polignac number, because 3929889 - 2⁵ = 3929857 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3929879) 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, 654979 + ... + 654984.

It is an arithmetic number, because the mean of its divisors is an integer number (1309964).

Almost surely, 2^3929889 is an apocalyptic number.

It is an amenable number.

3929889 is a deficient number, since it is larger than the sum of its proper divisors (1309967).

3929889 is a wasteful number, since it uses less digits than its factorization.

3929889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309966.

The product of its digits is 279936, while the sum is 48.

The square root of 3929889 is about 1982.3947639156. The cubic root of 3929889 is about 157.8071807964.

The spelling of 3929889 in words is "three million, nine hundred twenty-nine thousand, eight hundred eighty-nine".