43478326091 has 2 divisors, whose sum is σ = 43478326092. Its totient is φ = 43478326090.

The previous prime is 43478326051. The next prime is 43478326103. The reversal of 43478326091 is 19062387434.

43478326091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43478326091 is a prime.

It is not a weakly prime, because it can be changed into another prime (43478326051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21739163045 + 21739163046.

It is an arithmetic number, because the mean of its divisors is an integer number (21739163046).

Almost surely, 2^43478326091 is an apocalyptic number.

43478326091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43478326091 is an equidigital number, since it uses as much as digits as its factorization.

43478326091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 43478326091 in words is "forty-three billion, four hundred seventy-eight million, three hundred twenty-six thousand, ninety-one".