4489812809 has 4 divisors (see below), whose sum is σ = 4490223120. Its totient is φ = 4489402500.

The previous prime is 4489812779. The next prime is 4489812823. The reversal of 4489812809 is 9082189844.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-4489812809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4489812109) 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, 188279 + ... + 210780.

It is an arithmetic number, because the mean of its divisors is an integer number (1122555780).

Almost surely, 2^4489812809 is an apocalyptic number.

It is an amenable number.

4489812809 is a deficient number, since it is larger than the sum of its proper divisors (410311).

4489812809 is a wasteful number, since it uses less digits than its factorization.

4489812809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410310.

The product of its (nonzero) digits is 1327104, while the sum is 53.

The square root of 4489812809 is about 67006.0654642548. The cubic root of 4489812809 is about 1649.7168548730.

The spelling of 4489812809 in words is "four billion, four hundred eighty-nine million, eight hundred twelve thousand, eight hundred nine".