99724142 has 32 divisors (see below), whose sum is σ = 184006080. Its totient is φ = 39559680.

The previous prime is 99724129. The next prime is 99724151. The reversal of 99724142 is 24142799.

It is a junction number, because it is equal to n+sod(n) for n = 99724096 and 99724105.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11084 + ... + 17952.

It is an arithmetic number, because the mean of its divisors is an integer number (5750190).

Almost surely, 2^99724142 is an apocalyptic number.

99724142 is a deficient number, since it is larger than the sum of its proper divisors (84281938).

99724142 is a wasteful number, since it uses less digits than its factorization.

99724142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956.

The product of its digits is 36288, while the sum is 38.

The square root of 99724142 is about 9986.1975746527. The cubic root of 99724142 is about 463.7316838280.

The spelling of 99724142 in words is "ninety-nine million, seven hundred twenty-four thousand, one hundred forty-two".