99788147 has 4 divisors (see below), whose sum is σ = 105658056. Its totient is φ = 93918240.

The previous prime is 99788119. The next prime is 99788167. The reversal of 99788147 is 74188799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74188799 = 17 ⋅4364047.

It is a cyclic number.

It is not a de Polignac number, because 99788147 - 2¹⁰ = 99787123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99788167) 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, 2934929 + ... + 2934962.

It is an arithmetic number, because the mean of its divisors is an integer number (26414514).

Almost surely, 2^99788147 is an apocalyptic number.

99788147 is a deficient number, since it is larger than the sum of its proper divisors (5869909).

99788147 is a wasteful number, since it uses less digits than its factorization.

99788147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5869908.

The product of its digits is 1016064, while the sum is 53.

The square root of 99788147 is about 9989.4017338377. The cubic root of 99788147 is about 463.8308734461.

The spelling of 99788147 in words is "ninety-nine million, seven hundred eighty-eight thousand, one hundred forty-seven".