99639269 has 2 divisors, whose sum is σ = 99639270. Its totient is φ = 99639268.

The previous prime is 99639257. The next prime is 99639271. The reversal of 99639269 is 96293699.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94965025 + 4674244 = 9745^2 + 2162^2 .

It is an emirp because it is prime and its reverse (96293699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99639269 - 2²⁰ = 98590693 is a prime.

It is a super-2 number, since 2×99639269² = 19855967853708722, which contains 22 as substring.

Together with 99639271, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99639269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99639569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49819634 + 49819635.

It is an arithmetic number, because the mean of its divisors is an integer number (49819635).

Almost surely, 2^99639269 is an apocalyptic number.

It is an amenable number.

99639269 is a deficient number, since it is larger than the sum of its proper divisors (1).

99639269 is an equidigital number, since it uses as much as digits as its factorization.

99639269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 53.

The square root of 99639269 is about 9981.9471547389. The cubic root of 99639269 is about 463.6000892466.

The spelling of 99639269 in words is "ninety-nine million, six hundred thirty-nine thousand, two hundred sixty-nine".