99199181 has 2 divisors, whose sum is σ = 99199182. Its totient is φ = 99199180.

The previous prime is 99199159. The next prime is 99199201. The reversal of 99199181 is 18199199.

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., 87123556 + 12075625 = 9334^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99199181 is a prime.

It is a super-2 number, since 2×99199181² = 19680955022141522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99199381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49599590 + 49599591.

It is an arithmetic number, because the mean of its divisors is an integer number (49599591).

Almost surely, 2^99199181 is an apocalyptic number.

It is an amenable number.

99199181 is a deficient number, since it is larger than the sum of its proper divisors (1).

99199181 is an equidigital number, since it uses as much as digits as its factorization.

99199181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 47.

The square root of 99199181 is about 9959.8785635167. The cubic root of 99199181 is about 462.9165369444.

The spelling of 99199181 in words is "ninety-nine million, one hundred ninety-nine thousand, one hundred eighty-one".