99128269 has 4 divisors (see below), whose sum is σ = 99151996. Its totient is φ = 99104544.

The previous prime is 99128257. The next prime is 99128299. The reversal of 99128269 is 96282199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96282199 = 13 ⋅7406323.

It can be written as a sum of positive squares in 2 ways, for example, as 22915369 + 76212900 = 4787^2 + 8730^2 .

It is a cyclic number.

It is not a de Polignac number, because 99128269 - 2⁹ = 99127757 is a prime.

It is a super-2 number, since 2×99128269² = 19652827429872722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99128299) 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, 3744 + ... + 14569.

It is an arithmetic number, because the mean of its divisors is an integer number (24787999).

Almost surely, 2^99128269 is an apocalyptic number.

It is an amenable number.

99128269 is a deficient number, since it is larger than the sum of its proper divisors (23727).

99128269 is a wasteful number, since it uses less digits than its factorization.

99128269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23726.

The product of its digits is 139968, while the sum is 46.

The square root of 99128269 is about 9956.3180443375. The cubic root of 99128269 is about 462.8062061864.

It can be divided in two parts, 9912 and 8269, that added together give a palindrome (18181).

The spelling of 99128269 in words is "ninety-nine million, one hundred twenty-eight thousand, two hundred sixty-nine".