99646559 has 4 divisors (see below), whose sum is σ = 99681720. Its totient is φ = 99611400.

The previous prime is 99646549. The next prime is 99646567. The reversal of 99646559 is 95564699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99646559 - 2⁴ = 99646543 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 99646559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99646549) 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, 12917 + ... + 19134.

It is an arithmetic number, because the mean of its divisors is an integer number (24920430).

Almost surely, 2^99646559 is an apocalyptic number.

99646559 is a deficient number, since it is larger than the sum of its proper divisors (35161).

99646559 is a wasteful number, since it uses less digits than its factorization.

99646559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35160.

The product of its digits is 2624400, while the sum is 53.

The square root of 99646559 is about 9982.3123072763. The cubic root of 99646559 is about 463.6113952383.

The spelling of 99646559 in words is "ninety-nine million, six hundred forty-six thousand, five hundred fifty-nine".