99988823 has 4 divisors (see below), whose sum is σ = 109078728. Its totient is φ = 90898920.

The previous prime is 99988813. The next prime is 99988829. The reversal of 99988823 is 32888999.

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

It is a cyclic number.

It is not a de Polignac number, because 99988823 - 2⁴ = 99988807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99988829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4544936 + ... + 4544957.

It is an arithmetic number, because the mean of its divisors is an integer number (27269682).

Almost surely, 2^99988823 is an apocalyptic number.

99988823 is a deficient number, since it is larger than the sum of its proper divisors (9089905).

99988823 is a wasteful number, since it uses less digits than its factorization.

99988823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089904.

The product of its digits is 2239488, while the sum is 56.

The square root of 99988823 is about 9999.4411343835. The cubic root of 99988823 is about 464.1415897042.

The spelling of 99988823 in words is "ninety-nine million, nine hundred eighty-eight thousand, eight hundred twenty-three".