99991344 has 20 divisors (see below), whose sum is σ = 258311096. Its totient is φ = 33330432.

The previous prime is 99991343. The next prime is 99991363. The reversal of 99991344 is 44319999.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 2083153 = 99991344 / (9 + 9 + 9 + 9 + 1 + 3 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 99991293 and 99991302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99991343) 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 3 ways as a sum of consecutive naturals, for example, 1041529 + ... + 1041624.

Almost surely, 2^99991344 is an apocalyptic number.

It is an amenable number.

99991344 is an abundant number, since it is smaller than the sum of its proper divisors (158319752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99991344 is a wasteful number, since it uses less digits than its factorization.

99991344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083164 (or 2083158 counting only the distinct ones).

The product of its digits is 314928, while the sum is 48.

The square root of 99991344 is about 9999.5671906338. The cubic root of 99991344 is about 464.1454904439.

The spelling of 99991344 in words is "ninety-nine million, nine hundred ninety-one thousand, three hundred forty-four".