999489898 has 16 divisors (see below), whose sum is σ = 1636853760. Its totient is φ = 453945600.

The previous prime is 999489877. The next prime is 999489899. The reversal of 999489898 is 898984999.

It is a self number, because there is not a number n which added to its sum of digits gives 999489898.

It is not an unprimeable number, because it can be changed into a prime (999489899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10378 + ... + 45898.

It is an arithmetic number, because the mean of its divisors is an integer number (102303360).

Almost surely, 2^999489898 is an apocalyptic number.

999489898 is a deficient number, since it is larger than the sum of its proper divisors (637363862).

999489898 is a wasteful number, since it uses less digits than its factorization.

999489898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36813.

The product of its digits is 120932352, while the sum is 73.

The square root of 999489898 is about 31614.7101520795. The cubic root of 999489898 is about 999.8299370802.

The spelling of 999489898 in words is "nine hundred ninety-nine million, four hundred eighty-nine thousand, eight hundred ninety-eight".