99729999 has 12 divisors (see below), whose sum is σ = 147568512. Its totient is φ = 64864800.

The previous prime is 99729989. The next prime is 99730009. The reversal of 99729999 is 99992799.

It is an interprime number because it is at equal distance from previous prime (99729989) and next prime (99730009).

It is not a de Polignac number, because 99729999 - 2⁴ = 99729983 is a prime.

99729999 is a modest number, since divided by 9999 gives 9972 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99729919) 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, 134767 + ... + 135504.

It is an arithmetic number, because the mean of its divisors is an integer number (12297376).

Almost surely, 2^99729999 is an apocalyptic number.

99729999 is a deficient number, since it is larger than the sum of its proper divisors (47838513).

99729999 is a wasteful number, since it uses less digits than its factorization.

99729999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270318 (or 270315 counting only the distinct ones).

The product of its digits is 7440174, while the sum is 63.

The square root of 99729999 is about 9986.4908251097. The cubic root of 99729999 is about 463.7407622826.

The spelling of 99729999 in words is "ninety-nine million, seven hundred twenty-nine thousand, nine hundred ninety-nine".