3867989 has 4 divisors (see below), whose sum is σ = 3877356. Its totient is φ = 3858624.

The previous prime is 3867961. The next prime is 3868003. The reversal of 3867989 is 9897683.

3867989 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.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 3179089 = 830^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 3867989 - 2⁸ = 3867733 is a prime.

It is a super-2 number, since 2×3867989² = 29922677808242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3867389) 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, 4034 + ... + 4899.

It is an arithmetic number, because the mean of its divisors is an integer number (969339).

Almost surely, 2^3867989 is an apocalyptic number.

It is an amenable number.

3867989 is a deficient number, since it is larger than the sum of its proper divisors (9367).

3867989 is an equidigital number, since it uses as much as digits as its factorization.

3867989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9366.

The product of its digits is 653184, while the sum is 50.

The square root of 3867989 is about 1966.7203664985. The cubic root of 3867989 is about 156.9742476051.

The spelling of 3867989 in words is "three million, eight hundred sixty-seven thousand, nine hundred eighty-nine".