99829987 has 4 divisors (see below), whose sum is σ = 99983520. Its totient is φ = 99676456.

The previous prime is 99829949. The next prime is 99829997. The reversal of 99829987 is 78992899.

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 99829987 - 2⁷ = 99829859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99829937) 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, 75787 + ... + 77092.

It is an arithmetic number, because the mean of its divisors is an integer number (24995880).

Almost surely, 2^99829987 is an apocalyptic number.

99829987 is a deficient number, since it is larger than the sum of its proper divisors (153533).

99829987 is a wasteful number, since it uses less digits than its factorization.

99829987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153532.

The product of its digits is 5878656, while the sum is 61.

The square root of 99829987 is about 9991.4957338729. The cubic root of 99829987 is about 463.8956906702.

The spelling of 99829987 in words is "ninety-nine million, eight hundred twenty-nine thousand, nine hundred eighty-seven".