99864499 has 12 divisors (see below), whose sum is σ = 116680824. Its totient is φ = 85221024.

The previous prime is 99864493. The next prime is 99864509. The reversal of 99864499 is 99446899.

It is not a de Polignac number, because 99864499 - 2¹³ = 99856307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99864493) 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 11 ways as a sum of consecutive naturals, for example, 7044 + ... + 15790.

It is an arithmetic number, because the mean of its divisors is an integer number (9723402).

Almost surely, 2^99864499 is an apocalyptic number.

99864499 is a deficient number, since it is larger than the sum of its proper divisors (16816325).

99864499 is a wasteful number, since it uses less digits than its factorization.

99864499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994 (or 8987 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 58.

The square root of 99864499 is about 9993.2226533786. Note that the first 3 decimals coincide. The cubic root of 99864499 is about 463.9491419560.

The spelling of 99864499 in words is "ninety-nine million, eight hundred sixty-four thousand, four hundred ninety-nine".