99854639 has 12 divisors (see below), whose sum is σ = 103784688. Its totient is φ = 96012000.

The previous prime is 99854603. The next prime is 99854641. The reversal of 99854639 is 93645899.

It is not a de Polignac number, because 99854639 - 2⁸ = 99854383 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 (99854659) 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 11 ways as a sum of consecutive naturals, for example, 661214 + ... + 661364.

It is an arithmetic number, because the mean of its divisors is an integer number (8648724).

Almost surely, 2^99854639 is an apocalyptic number.

99854639 is a deficient number, since it is larger than the sum of its proper divisors (3930049).

99854639 is a wasteful number, since it uses less digits than its factorization.

99854639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 319 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 99854639 is about 9992.7293068511. The cubic root of 99854639 is about 463.9338723018.

The spelling of 99854639 in words is "ninety-nine million, eight hundred fifty-four thousand, six hundred thirty-nine".