99194209 has 2 divisors, whose sum is σ = 99194210. Its totient is φ = 99194208.

The previous prime is 99194197. The next prime is 99194257. The reversal of 99194209 is 90249199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74909025 + 24285184 = 8655^2 + 4928^2 .

It is a cyclic number.

It is not a de Polignac number, because 99194209 - 2⁵ = 99194177 is a prime.

It is not a weakly prime, because it can be changed into another prime (99194279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49597104 + 49597105.

It is an arithmetic number, because the mean of its divisors is an integer number (49597105).

Almost surely, 2^99194209 is an apocalyptic number.

It is an amenable number.

99194209 is a deficient number, since it is larger than the sum of its proper divisors (1).

99194209 is an equidigital number, since it uses as much as digits as its factorization.

99194209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 99194209 is about 9959.6289589522. The cubic root of 99194209 is about 462.9088028097.

The spelling of 99194209 in words is "ninety-nine million, one hundred ninety-four thousand, two hundred nine".