99163891 has 8 divisors (see below), whose sum is σ = 101859120. Its totient is φ = 96486432.

The previous prime is 99163877. The next prime is 99163903. The reversal of 99163891 is 19836199.

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 99163891 - 2⁵ = 99163859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99163291) 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, 7281 + ... + 15853.

It is an arithmetic number, because the mean of its divisors is an integer number (12732390).

Almost surely, 2^99163891 is an apocalyptic number.

99163891 is a deficient number, since it is larger than the sum of its proper divisors (2695229).

99163891 is a wasteful number, since it uses less digits than its factorization.

99163891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885.

The product of its digits is 104976, while the sum is 46.

The square root of 99163891 is about 9958.1067979812. The cubic root of 99163891 is about 462.8616364166.

The spelling of 99163891 in words is "ninety-nine million, one hundred sixty-three thousand, eight hundred ninety-one".