43190993 has 2 divisors, whose sum is σ = 43190994. Its totient is φ = 43190992.

The previous prime is 43190969. The next prime is 43191013. The reversal of 43190993 is 39909134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23892544 + 19298449 = 4888^2 + 4393^2 .

It is a cyclic number.

It is not a de Polignac number, because 43190993 - 2⁸ = 43190737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43190093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21595496 + 21595497.

It is an arithmetic number, because the mean of its divisors is an integer number (21595497).

Almost surely, 2^43190993 is an apocalyptic number.

It is an amenable number.

43190993 is a deficient number, since it is larger than the sum of its proper divisors (1).

43190993 is an equidigital number, since it uses as much as digits as its factorization.

43190993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 43190993 is about 6571.9854686388. The cubic root of 43190993 is about 350.8577411241.

The spelling of 43190993 in words is "forty-three million, one hundred ninety thousand, nine hundred ninety-three".