99432217 has 2 divisors, whose sum is σ = 99432218. Its totient is φ = 99432216.

The previous prime is 99432199. The next prime is 99432241. The reversal of 99432217 is 71223499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98883136 + 549081 = 9944^2 + 741^2 .

It is an emirp because it is prime and its reverse (71223499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99432217 - 2¹⁹ = 98907929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99432017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49716108 + 49716109.

It is an arithmetic number, because the mean of its divisors is an integer number (49716109).

Almost surely, 2^99432217 is an apocalyptic number.

It is an amenable number.

99432217 is a deficient number, since it is larger than the sum of its proper divisors (1).

99432217 is an equidigital number, since it uses as much as digits as its factorization.

99432217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 99432217 is about 9971.5704380002. The cubic root of 99432217 is about 463.2787437483.

The spelling of 99432217 in words is "ninety-nine million, four hundred thirty-two thousand, two hundred seventeen".