99688289 has 8 divisors (see below), whose sum is σ = 106999560. Its totient is φ = 92537856.

The previous prime is 99688247. The next prime is 99688321. The reversal of 99688289 is 98288699.

It can be written as a sum of positive squares in 4 ways, for example, as 46689889 + 52998400 = 6833^2 + 7280^2 .

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 99688289 - 2¹⁶ = 99622753 is a prime.

It is a super-3 number, since 3×99688289³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99688789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38924 + ... + 41405.

It is an arithmetic number, because the mean of its divisors is an integer number (13374945).

Almost surely, 2^99688289 is an apocalyptic number.

It is an amenable number.

99688289 is a deficient number, since it is larger than the sum of its proper divisors (7311271).

99688289 is a wasteful number, since it uses less digits than its factorization.

99688289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80419.

The product of its digits is 4478976, while the sum is 59.

The square root of 99688289 is about 9984.4022855652. The cubic root of 99688289 is about 463.6761032881.

The spelling of 99688289 in words is "ninety-nine million, six hundred eighty-eight thousand, two hundred eighty-nine".