99147 has 4 divisors (see below), whose sum is σ = 132200. Its totient is φ = 66096.

The previous prime is 99139. The next prime is 99149. The reversal of 99147 is 74199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74199 = 3 ⋅24733.

It is not a de Polignac number, because 99147 - 2³ = 99139 is a prime.

It is a D-number.

It is a Duffinian number.

99147 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99149) 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, 16522 + ... + 16527.

It is an arithmetic number, because the mean of its divisors is an integer number (33050).

2⁹⁹¹⁴⁷ is an apocalyptic number.

99147 is a deficient number, since it is larger than the sum of its proper divisors (33053).

99147 is a wasteful number, since it uses less digits than its factorization.

99147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33052.

The product of its digits is 2268, while the sum is 30.

The square root of 99147 is about 314.8761661352. The cubic root of 99147 is about 46.2835354539.

The spelling of 99147 in words is "ninety-nine thousand, one hundred forty-seven".