99990067 has 4 divisors (see below), whose sum is σ = 100709560. Its totient is φ = 99270576.

The previous prime is 99990053. The next prime is 99990083. The reversal of 99990067 is 76009999.

It is a happy number.

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 99990067 - 2¹¹ = 99988019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99990067.

It is not an unprimeable number, because it can be changed into a prime (99990467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359538 + ... + 359815.

It is an arithmetic number, because the mean of its divisors is an integer number (25177390).

Almost surely, 2^99990067 is an apocalyptic number.

99990067 is a deficient number, since it is larger than the sum of its proper divisors (719493).

99990067 is a wasteful number, since it uses less digits than its factorization.

99990067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719492.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 99990067 is about 9999.5033376663. The cubic root of 99990067 is about 464.1435145518.

The spelling of 99990067 in words is "ninety-nine million, nine hundred ninety thousand, sixty-seven".