99071217 has 12 divisors (see below), whose sum is σ = 163546240. Its totient is φ = 56612088.

The previous prime is 99071213. The next prime is 99071267. The reversal of 99071217 is 71217099.

It is not a de Polignac number, because 99071217 - 2² = 99071213 is a prime.

It is a super-2 number, since 2×99071217² = 19630212075722178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99071213) 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 11 ways as a sum of consecutive naturals, for example, 786217 + ... + 786342.

Almost surely, 2^99071217 is an apocalyptic number.

It is an amenable number.

99071217 is a deficient number, since it is larger than the sum of its proper divisors (64475023).

99071217 is a wasteful number, since it uses less digits than its factorization.

99071217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572572 (or 1572569 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 99071217 is about 9953.4525165894. The cubic root of 99071217 is about 462.7174017614.

The spelling of 99071217 in words is "ninety-nine million, seventy-one thousand, two hundred seventeen".