43801091 has 2 divisors, whose sum is σ = 43801092. Its totient is φ = 43801090.

The previous prime is 43801067. The next prime is 43801103. The reversal of 43801091 is 19010834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43801091 - 2¹⁰ = 43800067 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43801091.

It is not a weakly prime, because it can be changed into another prime (43801031) 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, 21900545 + 21900546.

It is an arithmetic number, because the mean of its divisors is an integer number (21900546).

Almost surely, 2^43801091 is an apocalyptic number.

43801091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43801091 is an equidigital number, since it uses as much as digits as its factorization.

43801091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 43801091 is about 6618.2392673580. The cubic root of 43801091 is about 352.5020464982.

The spelling of 43801091 in words is "forty-three million, eight hundred one thousand, ninety-one".