99784987239 has 48 divisors (see below), whose sum is σ = 159465286656. Its totient is φ = 55299585600.

The previous prime is 99784987231. The next prime is 99784987259. The reversal of 99784987239 is 93278948799.

It is not a de Polignac number, because 99784987239 - 2³ = 99784987231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99784987231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1662034 + ... + 1721024.

It is an arithmetic number, because the mean of its divisors is an integer number (3322193472).

Almost surely, 2^99784987239 is an apocalyptic number.

99784987239 is a deficient number, since it is larger than the sum of its proper divisors (59680299417).

99784987239 is a wasteful number, since it uses less digits than its factorization.

99784987239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59356 (or 59349 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 75.

The spelling of 99784987239 in words is "ninety-nine billion, seven hundred eighty-four million, nine hundred eighty-seven thousand, two hundred thirty-nine".