99999559 has 16 divisors (see below), whose sum is σ = 115831296. Its totient is φ = 85321600.

The previous prime is 99999551. The next prime is 99999563. The reversal of 99999559 is 95599999.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99999559 - 2³ = 99999551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99999559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109314 + ... + 110224.

It is an arithmetic number, because the mean of its divisors is an integer number (7239456).

Almost surely, 2^99999559 is an apocalyptic number.

99999559 is a deficient number, since it is larger than the sum of its proper divisors (15831737).

99999559 is a wasteful number, since it uses less digits than its factorization.

99999559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526.

The product of its digits is 13286025, while the sum is 64.

The square root of 99999559 is about 9999.9779499757. The cubic root of 99999559 is about 464.1582010467.

The spelling of 99999559 in words is "ninety-nine million, nine hundred ninety-nine thousand, five hundred fifty-nine".