999999814 has 16 divisors (see below), whose sum is σ = 1680590736. Its totient is φ = 442260000.

The previous prime is 999999797. The next prime is 999999883. The reversal of 999999814 is 418999999.

It is a self number, because there is not a number n which added to its sum of digits gives 999999814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613437 + ... + 615064.

It is an arithmetic number, because the mean of its divisors is an integer number (105036921).

Almost surely, 2^999999814 is an apocalyptic number.

999999814 is a deficient number, since it is larger than the sum of its proper divisors (680590922).

999999814 is a wasteful number, since it uses less digits than its factorization.

999999814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228551.

The product of its digits is 17006112, while the sum is 67.

The square root of 999999814 is about 31622.7736607654. The cubic root of 999999814 is about 999.9999380000. Note that the first 4 decimals are identical.

The spelling of 999999814 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred fourteen".