999118618 has 4 divisors (see below), whose sum is σ = 1498677930. Its totient is φ = 499559308.

The previous prime is 999118607. The next prime is 999118619. The reversal of 999118618 is 816811999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 938013129 + 61105489 = 30627^2 + 7817^2 .

It is not an unprimeable number, because it can be changed into a prime (999118619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249779653 + ... + 249779656.

Almost surely, 2^999118618 is an apocalyptic number.

999118618 is a deficient number, since it is larger than the sum of its proper divisors (499559312).

999118618 is a wasteful number, since it uses less digits than its factorization.

999118618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499559311.

The product of its digits is 279936, while the sum is 52.

The square root of 999118618 is about 31608.8376565795. The cubic root of 999118618 is about 999.7061196428.

The spelling of 999118618 in words is "nine hundred ninety-nine million, one hundred eighteen thousand, six hundred eighteen".