99217147 has 8 divisors (see below), whose sum is σ = 104950944. Its totient is φ = 93601728.

The previous prime is 99217093. The next prime is 99217169. The reversal of 99217147 is 74171299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99217147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99217747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27868 + ... + 31225.

It is an arithmetic number, because the mean of its divisors is an integer number (13118868).

Almost surely, 2^99217147 is an apocalyptic number.

99217147 is a deficient number, since it is larger than the sum of its proper divisors (5733797).

99217147 is a wasteful number, since it uses less digits than its factorization.

99217147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59189.

The product of its digits is 31752, while the sum is 40.

The square root of 99217147 is about 9960.7804413108. The cubic root of 99217147 is about 462.9444815853.

The spelling of 99217147 in words is "ninety-nine million, two hundred seventeen thousand, one hundred forty-seven".