99512887 has 4 divisors (see below), whose sum is σ = 100088280. Its totient is φ = 98937496.

The previous prime is 99512867. The next prime is 99512911. The reversal of 99512887 is 78821599.

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 99512887 - 2¹⁹ = 98988599 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 99512887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99512837) 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, 287437 + ... + 287782.

It is an arithmetic number, because the mean of its divisors is an integer number (25022070).

Almost surely, 2^99512887 is an apocalyptic number.

99512887 is a deficient number, since it is larger than the sum of its proper divisors (575393).

99512887 is a wasteful number, since it uses less digits than its factorization.

99512887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575392.

The product of its digits is 362880, while the sum is 49.

The square root of 99512887 is about 9975.6146176564. The cubic root of 99512887 is about 463.4039968940.

The spelling of 99512887 in words is "ninety-nine million, five hundred twelve thousand, eight hundred eighty-seven".