99947 has 4 divisors (see below), whose sum is σ = 101160. Its totient is φ = 98736.

The previous prime is 99929. The next prime is 99961. The reversal of 99947 is 74999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74999 = 37 ⋅2027.

It is a cyclic number.

It is not a de Polignac number, because 99947 - 2¹⁴ = 83563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99947.

It is not an unprimeable number, because it can be changed into a prime (99907) 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, 473 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (25290).

2⁹⁹⁹⁴⁷ is an apocalyptic number.

99947 is a deficient number, since it is larger than the sum of its proper divisors (1213).

99947 is a wasteful number, since it uses less digits than its factorization.

99947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 20412, while the sum is 38.

The square root of 99947 is about 316.1439545524. The cubic root of 99947 is about 46.4076867467.

It can be divided in two parts, 9994 and 7, that added together give a palindrome (10001).

The spelling of 99947 in words is "ninety-nine thousand, nine hundred forty-seven".