99447 has 4 divisors (see below), whose sum is σ = 132600. Its totient is φ = 66296.

The previous prime is 99439. The next prime is 99469. The reversal of 99447 is 74499.

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 99447 - 2³ = 99439 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99447.

It is not an unprimeable number, because it can be changed into a prime (99487) 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, 16572 + ... + 16577.

It is an arithmetic number, because the mean of its divisors is an integer number (33150).

2⁹⁹⁴⁴⁷ is an apocalyptic number.

99447 is a deficient number, since it is larger than the sum of its proper divisors (33153).

99447 is a wasteful number, since it uses less digits than its factorization.

99447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33152.

The product of its digits is 9072, while the sum is 33.

The square root of 99447 is about 315.3521840736. The cubic root of 99447 is about 46.3301701801.

It can be divided in two parts, 99 and 447, that multiplied together give a triangular number (44253 = T₂₉₇).

The spelling of 99447 in words is "ninety-nine thousand, four hundred forty-seven".