99619889 has 8 divisors (see below), whose sum is σ = 100800288. Its totient is φ = 98444320.

The previous prime is 99619879. The next prime is 99619909. The reversal of 99619889 is 98891699.

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 99619889 - 2¹⁶ = 99554353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99619879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54854 + ... + 56640.

It is an arithmetic number, because the mean of its divisors is an integer number (12600036).

Almost surely, 2^99619889 is an apocalyptic number.

It is an amenable number.

99619889 is a deficient number, since it is larger than the sum of its proper divisors (1180399).

99619889 is a wasteful number, since it uses less digits than its factorization.

99619889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415.

The product of its digits is 2519424, while the sum is 59.

The square root of 99619889 is about 9980.9763550466. The cubic root of 99619889 is about 463.5700303071.

The spelling of 99619889 in words is "ninety-nine million, six hundred nineteen thousand, eight hundred eighty-nine".