999817814 has 8 divisors (see below), whose sum is σ = 1499870088. Its totient is φ = 499861120.

The previous prime is 999817813. The next prime is 999817817. The reversal of 999817814 is 418718999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×999817814² = 1999271322383477192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999817814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999817813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14774 + ... + 47094.

It is an arithmetic number, because the mean of its divisors is an integer number (187483761).

Almost surely, 2^999817814 is an apocalyptic number.

999817814 is a deficient number, since it is larger than the sum of its proper divisors (500052274).

999817814 is a wasteful number, since it uses less digits than its factorization.

999817814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47790.

The product of its digits is 1306368, while the sum is 56.

The square root of 999817814 is about 31619.8958568810. The cubic root of 999817814 is about 999.9392676450.

The spelling of 999817814 in words is "nine hundred ninety-nine million, eight hundred seventeen thousand, eight hundred fourteen".