43194449 has 2 divisors, whose sum is σ = 43194450. Its totient is φ = 43194448.

The previous prime is 43194421. The next prime is 43194451. The reversal of 43194449 is 94449134.

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., 32092225 + 11102224 = 5665^2 + 3332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43194449 is a prime.

Together with 43194451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43194409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21597224 + 21597225.

It is an arithmetic number, because the mean of its divisors is an integer number (21597225).

Almost surely, 2^43194449 is an apocalyptic number.

It is an amenable number.

43194449 is a deficient number, since it is larger than the sum of its proper divisors (1).

43194449 is an equidigital number, since it uses as much as digits as its factorization.

43194449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 43194449 is about 6572.2483976186. The cubic root of 43194449 is about 350.8670990321.

The spelling of 43194449 in words is "forty-three million, one hundred ninety-four thousand, four hundred forty-nine".