99999822 has 32 divisors (see below), whose sum is σ = 217621152. Its totient is φ = 30449664.

The previous prime is 99999821. The next prime is 99999827. The reversal of 99999822 is 22899999.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999821) 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, 958 + ... + 14174.

It is an arithmetic number, because the mean of its divisors is an integer number (6800661).

Almost surely, 2^99999822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108810576).

99999822 is an abundant number, since it is smaller than the sum of its proper divisors (117621330).

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

99999822 is a wasteful number, since it uses less digits than its factorization.

99999822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13332.

The product of its digits is 1889568, while the sum is 57.

The square root of 99999822 is about 9999.9910999960. The cubic root of 99999822 is about 464.1586079602.

The spelling of 99999822 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred twenty-two".