999489539 has 4 divisors (see below), whose sum is σ = 999570360. Its totient is φ = 999408720.

The previous prime is 999489527. The next prime is 999489571. The reversal of 999489539 is 935984999.

It is a semiprime because it is the product of two primes, 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 999489539 - 2²⁴ = 982712323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999489599) 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, 17549 + ... + 48030.

It is an arithmetic number, because the mean of its divisors is an integer number (249892590).

Almost surely, 2^999489539 is an apocalyptic number.

999489539 is a deficient number, since it is larger than the sum of its proper divisors (80821).

999489539 is a wasteful number, since it uses less digits than its factorization.

999489539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80820.

The product of its digits is 28343520, while the sum is 65.

The square root of 999489539 is about 31614.7044743423. The cubic root of 999489539 is about 999.8298173728.

The spelling of 999489539 in words is "nine hundred ninety-nine million, four hundred eighty-nine thousand, five hundred thirty-nine".