99872 has 12 divisors (see below), whose sum is σ = 196686. Its totient is φ = 49920.

The previous prime is 99871. The next prime is 99877. The reversal of 99872 is 27899.

It can be written as a sum of positive squares in only one way, i.e., 99856 + 16 = 316^2 + 4^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1529 + ... + 1592.

2⁹⁹⁸⁷² is an apocalyptic number.

It is an amenable number.

99872 is a deficient number, since it is larger than the sum of its proper divisors (96814).

99872 is a wasteful number, since it uses less digits than its factorization.

99872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131 (or 3123 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 99872 is about 316.0253154417. The cubic root of 99872 is about 46.3960757680.

The spelling of 99872 in words is "ninety-nine thousand, eight hundred seventy-two".