4088989 has 4 divisors (see below), whose sum is σ = 4093056. Its totient is φ = 4084924.

The previous prime is 4088977. The next prime is 4089011. The reversal of 4088989 is 9898804.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4088989 - 2⁵ = 4088957 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 (4082989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (1023264).

Almost surely, 2^4088989 is an apocalyptic number.

It is an amenable number.

4088989 is a deficient number, since it is larger than the sum of its proper divisors (4067).

4088989 is a wasteful number, since it uses less digits than its factorization.

4088989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 4088989 is about 2022.1248725042. The cubic root of 4088989 is about 159.9086588023.

The spelling of 4088989 in words is "four million, eighty-eight thousand, nine hundred eighty-nine".