99999724 has 36 divisors (see below), whose sum is σ = 193268152. Its totient is φ = 45239040.

The previous prime is 99999721. The next prime is 99999773. The reversal of 99999724 is 42799999.

It is not an unprimeable number, because it can be changed into a prime (99999721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148252 + ... + 148924.

Almost surely, 2^99999724 is an apocalyptic number.

It is an amenable number.

99999724 is a deficient number, since it is larger than the sum of its proper divisors (93268428).

99999724 is a wasteful number, since it uses less digits than its factorization.

99999724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 993 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 58.

The square root of 99999724 is about 9999.9861999905. The cubic root of 99999724 is about 464.1584563347.

The spelling of 99999724 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred twenty-four".