99564999 has 8 divisors (see below), whose sum is σ = 138525312. Its totient is φ = 63490680.

The previous prime is 99564979. The next prime is 99565003. The reversal of 99564999 is 99946599.

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

It is not a de Polignac number, because 99564999 - 2¹¹ = 99562951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99564979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721417 + ... + 721554.

It is an arithmetic number, because the mean of its divisors is an integer number (17315664).

Almost surely, 2^99564999 is an apocalyptic number.

99564999 is a deficient number, since it is larger than the sum of its proper divisors (38960313).

99564999 is a wasteful number, since it uses less digits than its factorization.

99564999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442997.

The product of its digits is 7085880, while the sum is 60.

The square root of 99564999 is about 9978.2262451801. The cubic root of 99564999 is about 463.4848731694.

The spelling of 99564999 in words is "ninety-nine million, five hundred sixty-four thousand, nine hundred ninety-nine".