99791147 has 4 divisors (see below), whose sum is σ = 99882240. Its totient is φ = 99700056.

The previous prime is 99791129. The next prime is 99791191. The reversal of 99791147 is 74119799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99791147 - 2¹⁶ = 99725611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99791047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43883 + ... + 46100.

It is an arithmetic number, because the mean of its divisors is an integer number (24970560).

Almost surely, 2^99791147 is an apocalyptic number.

99791147 is a deficient number, since it is larger than the sum of its proper divisors (91093).

99791147 is a wasteful number, since it uses less digits than its factorization.

99791147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91092.

The product of its digits is 142884, while the sum is 47.

The square root of 99791147 is about 9989.5518918518. The cubic root of 99791147 is about 463.8355215555.

The spelling of 99791147 in words is "ninety-nine million, seven hundred ninety-one thousand, one hundred forty-seven".