99021871 has 8 divisors (see below), whose sum is σ = 107022384. Its totient is φ = 91076160.

The previous prime is 99021869. The next prime is 99021899. The reversal of 99021871 is 17812099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99021871 - 2¹ = 99021869 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 99021871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021841) 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 7 ways as a sum of consecutive naturals, for example, 9901 + ... + 17206.

It is an arithmetic number, because the mean of its divisors is an integer number (13377798).

Almost surely, 2^99021871 is an apocalyptic number.

99021871 is a deficient number, since it is larger than the sum of its proper divisors (8000513).

99021871 is a wasteful number, since it uses less digits than its factorization.

99021871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27401.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 99021871 is about 9950.9733694750. The cubic root of 99021871 is about 462.6405646281.

The spelling of 99021871 in words is "ninety-nine million, twenty-one thousand, eight hundred seventy-one".