999129822 has 16 divisors (see below), whose sum is σ = 1998892560. Its totient is φ = 332937792.

The previous prime is 999129809. The next prime is 999129823. The reversal of 999129822 is 228921999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999129823) 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 in 7 ways as a sum of consecutive naturals, for example, 4447 + ... + 44922.

It is an arithmetic number, because the mean of its divisors is an integer number (124930785).

Almost surely, 2^999129822 is an apocalyptic number.

999129822 is an abundant number, since it is smaller than the sum of its proper divisors (999762738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999129822 is a wasteful number, since it uses less digits than its factorization.

999129822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52747.

The product of its digits is 419904, while the sum is 51.

The square root of 999129822 is about 31609.0148849976. The cubic root of 999129822 is about 999.7098564916.

The spelling of 999129822 in words is "nine hundred ninety-nine million, one hundred twenty-nine thousand, eight hundred twenty-two".