4409989 has 4 divisors (see below), whose sum is σ = 4425856. Its totient is φ = 4394124.

The previous prime is 4409981. The next prime is 4410019. The reversal of 4409989 is 9899044.

4409989 = T₁₅ + T₁₆ + ... + T₂₉₇.

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 4409989 - 2³ = 4409981 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 (4409981) 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, 7509 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (1106464).

Almost surely, 2^4409989 is an apocalyptic number.

It is an amenable number.

4409989 is a deficient number, since it is larger than the sum of its proper divisors (15867).

4409989 is a wasteful number, since it uses less digits than its factorization.

4409989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15866.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 4409989 is about 2099.9973809507. The cubic root of 4409989 is about 163.9881634329.

The spelling of 4409989 in words is "four million, four hundred nine thousand, nine hundred eighty-nine".