99169729 has 2 divisors, whose sum is σ = 99169730. Its totient is φ = 99169728.

The previous prime is 99169723. The next prime is 99169753. The reversal of 99169729 is 92796199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98962704 + 207025 = 9948^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99169729 is a prime.

It is not a weakly prime, because it can be changed into another prime (99169723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49584864 + 49584865.

It is an arithmetic number, because the mean of its divisors is an integer number (49584865).

Almost surely, 2^99169729 is an apocalyptic number.

It is an amenable number.

99169729 is a deficient number, since it is larger than the sum of its proper divisors (1).

99169729 is an equidigital number, since it uses as much as digits as its factorization.

99169729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 52.

The square root of 99169729 is about 9958.3999216742. The cubic root of 99169729 is about 462.8707194715.

The spelling of 99169729 in words is "ninety-nine million, one hundred sixty-nine thousand, seven hundred twenty-nine".