99724729 has 8 divisors (see below), whose sum is σ = 107960832. Its totient is φ = 91569360.

The previous prime is 99724727. The next prime is 99724739. The reversal of 99724729 is 92742799.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99724729 - 2¹ = 99724727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99724721) 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, 17599 + ... + 22564.

It is an arithmetic number, because the mean of its divisors is an integer number (13495104).

Almost surely, 2^99724729 is an apocalyptic number.

It is an amenable number.

99724729 is a deficient number, since it is larger than the sum of its proper divisors (8236103).

99724729 is a wasteful number, since it uses less digits than its factorization.

99724729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367.

The product of its digits is 571536, while the sum is 49.

The square root of 99724729 is about 9986.2269651756. The cubic root of 99724729 is about 463.7325937045.

The spelling of 99724729 in words is "ninety-nine million, seven hundred twenty-four thousand, seven hundred twenty-nine".