998585899 has 16 divisors (see below), whose sum is σ = 1065681792. Its totient is φ = 932456448.

The previous prime is 998585849. The next prime is 998585989.

It is a happy number.

998585899 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 998585899 - 2⁷ = 998585771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998585849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2156542 + ... + 2157004.

It is an arithmetic number, because the mean of its divisors is an integer number (66605112).

Almost surely, 2^998585899 is an apocalyptic number.

998585899 is a deficient number, since it is larger than the sum of its proper divisors (67095893).

998585899 is a wasteful number, since it uses less digits than its factorization.

998585899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 83980800, while the sum is 70.

The square root of 998585899 is about 31600.4097916467. The cubic root of 998585899 is about 999.5284106384.

The spelling of 998585899 in words is "nine hundred ninety-eight million, five hundred eighty-five thousand, eight hundred ninety-nine".