99965189 has 2 divisors, whose sum is σ = 99965190. Its totient is φ = 99965188.

The previous prime is 99965167. The next prime is 99965191. The reversal of 99965189 is 98156999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99341089 + 624100 = 9967^2 + 790^2 .

It is an emirp because it is prime and its reverse (98156999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99965189 - 2⁸ = 99964933 is a prime.

Together with 99965191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99965149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49982594 + 49982595.

It is an arithmetic number, because the mean of its divisors is an integer number (49982595).

Almost surely, 2^99965189 is an apocalyptic number.

It is an amenable number.

99965189 is a deficient number, since it is larger than the sum of its proper divisors (1).

99965189 is an equidigital number, since it uses as much as digits as its factorization.

99965189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 56.

The square root of 99965189 is about 9998.2592984979. The cubic root of 99965189 is about 464.1050176608.

The spelling of 99965189 in words is "ninety-nine million, nine hundred sixty-five thousand, one hundred eighty-nine".