99784042 has 16 divisors (see below), whose sum is σ = 153987552. Its totient is φ = 48459600.

The previous prime is 99784021. The next prime is 99784049. The reversal of 99784042 is 24048799.

It is a self number, because there is not a number n which added to its sum of digits gives 99784042.

It is not an unprimeable number, because it can be changed into a prime (99784049) 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, 77133 + ... + 78415.

It is an arithmetic number, because the mean of its divisors is an integer number (9624222).

Almost surely, 2^99784042 is an apocalyptic number.

99784042 is a deficient number, since it is larger than the sum of its proper divisors (54203510).

99784042 is a wasteful number, since it uses less digits than its factorization.

99784042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 99784042 is about 9989.1962639644. The cubic root of 99784042 is about 463.8245131321.

The spelling of 99784042 in words is "ninety-nine million, seven hundred eighty-four thousand, forty-two".