43194493 has 2 divisors, whose sum is σ = 43194494. Its totient is φ = 43194492.

The previous prime is 43194491. The next prime is 43194533. The reversal of 43194493 is 39449134.

43194493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34539129 + 8655364 = 5877^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 43194493 - 2¹ = 43194491 is a prime.

Together with 43194491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43194491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21597246 + 21597247.

It is an arithmetic number, because the mean of its divisors is an integer number (21597247).

Almost surely, 2^43194493 is an apocalyptic number.

It is an amenable number.

43194493 is a deficient number, since it is larger than the sum of its proper divisors (1).

43194493 is an equidigital number, since it uses as much as digits as its factorization.

43194493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 43194493 is about 6572.2517450262. The cubic root of 43194493 is about 350.8672181689.

The spelling of 43194493 in words is "forty-three million, one hundred ninety-four thousand, four hundred ninety-three".