99994999 has 4 divisors (see below), whose sum is σ = 107686936. Its totient is φ = 92303064.

The previous prime is 99994963. The next prime is 99995011. The reversal of 99994999 is 99949999.

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 99994999 - 2¹⁵ = 99962231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99994919) 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 3 ways as a sum of consecutive naturals, for example, 3845949 + ... + 3845974.

It is an arithmetic number, because the mean of its divisors is an integer number (26921734).

Almost surely, 2^99994999 is an apocalyptic number.

99994999 is a deficient number, since it is larger than the sum of its proper divisors (7691937).

99994999 is a wasteful number, since it uses less digits than its factorization.

99994999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691936.

The product of its digits is 19131876, while the sum is 67.

The square root of 99994999 is about 9999.7499468737. The cubic root of 99994999 is about 464.1511457037.

It can be divided in two parts, 9999 and 4999, that multiplied together give a triangular number (49985001 = T₉₉₉₈).

The spelling of 99994999 in words is "ninety-nine million, nine hundred ninety-four thousand, nine hundred ninety-nine".