3989289 has 4 divisors (see below), whose sum is σ = 5319056. Its totient is φ = 2659524.

The previous prime is 3989287. The next prime is 3989311. The reversal of 3989289 is 9829893.

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 3989289 - 2¹ = 3989287 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3989287) 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, 664879 + ... + 664884.

It is an arithmetic number, because the mean of its divisors is an integer number (1329764).

Almost surely, 2^3989289 is an apocalyptic number.

It is an amenable number.

3989289 is a deficient number, since it is larger than the sum of its proper divisors (1329767).

3989289 is a wasteful number, since it uses less digits than its factorization.

3989289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329766.

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

The square root of 3989289 is about 1997.3204550097. The cubic root of 3989289 is about 158.5982897671.

It can be divided in two parts, 3989 and 289, that added together give a triangular number (4278 = T₉₂).

The spelling of 3989289 in words is "three million, nine hundred eighty-nine thousand, two hundred eighty-nine".