99999239 has 8 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 95502616.

The previous prime is 99999217. The next prime is 99999247. The reversal of 99999239 is 93299999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999259) 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 7 ways as a sum of consecutive naturals, for example, 13514 + ... + 19560.

It is an arithmetic number, because the mean of its divisors is an integer number (13063680).

Almost surely, 2^99999239 is an apocalyptic number.

99999239 is a deficient number, since it is larger than the sum of its proper divisors (4510201).

99999239 is a wasteful number, since it uses less digits than its factorization.

99999239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6789.

The product of its digits is 3188646, while the sum is 59.

The square root of 99999239 is about 9999.9619499276. The cubic root of 99999239 is about 464.1577059419.

The spelling of 99999239 in words is "ninety-nine million, nine hundred ninety-nine thousand, two hundred thirty-nine".