99891385 has 8 divisors (see below), whose sum is σ = 130766976. Its totient is φ = 72648240.

The previous prime is 99891383. The next prime is 99891397. The reversal of 99891385 is 58319899.

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

It is not a de Polignac number, because 99891385 - 2¹ = 99891383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99891383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 908049 + ... + 908158.

It is an arithmetic number, because the mean of its divisors is an integer number (16345872).

Almost surely, 2^99891385 is an apocalyptic number.

It is an amenable number.

99891385 is a deficient number, since it is larger than the sum of its proper divisors (30875591).

99891385 is a wasteful number, since it uses less digits than its factorization.

99891385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816223.

The product of its digits is 699840, while the sum is 52.

The square root of 99891385 is about 9994.5677745463. The cubic root of 99891385 is about 463.9907737588.

The spelling of 99891385 in words is "ninety-nine million, eight hundred ninety-one thousand, three hundred eighty-five".