99828281 has 4 divisors (see below), whose sum is σ = 114089472. Its totient is φ = 85567092.

The previous prime is 99828247. The next prime is 99828319. The reversal of 99828281 is 18282899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99828281 - 2²⁶ = 32719417 is a prime.

It is a super-2 number, since 2×99828281² = 19931371374829922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99828181) 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, 7130585 + ... + 7130598.

It is an arithmetic number, because the mean of its divisors is an integer number (28522368).

Almost surely, 2^99828281 is an apocalyptic number.

It is an amenable number.

99828281 is a deficient number, since it is larger than the sum of its proper divisors (14261191).

99828281 is a wasteful number, since it uses less digits than its factorization.

99828281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261190.

The product of its digits is 165888, while the sum is 47.

The square root of 99828281 is about 9991.4103609050. The cubic root of 99828281 is about 463.8930481423.

The spelling of 99828281 in words is "ninety-nine million, eight hundred twenty-eight thousand, two hundred eighty-one".