99891519 has 16 divisors (see below), whose sum is σ = 163924992. Its totient is φ = 52689888.

The previous prime is 99891511. The next prime is 99891523. The reversal of 99891519 is 91519899.

It is not a de Polignac number, because 99891519 - 2³ = 99891511 is a prime.

It is a super-2 number, since 2×99891519² = 19956631136254722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99891511) 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 15 ways as a sum of consecutive naturals, for example, 182679 + ... + 183224.

It is an arithmetic number, because the mean of its divisors is an integer number (10245312).

Almost surely, 2^99891519 is an apocalyptic number.

99891519 is a deficient number, since it is larger than the sum of its proper divisors (64033473).

99891519 is a wasteful number, since it uses less digits than its factorization.

99891519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365926.

The product of its digits is 262440, while the sum is 51.

The square root of 99891519 is about 9994.5744781857. The cubic root of 99891519 is about 463.9909812332.

The spelling of 99891519 in words is "ninety-nine million, eight hundred ninety-one thousand, five hundred nineteen".