1028941091 has 2 divisors, whose sum is σ = 1028941092. Its totient is φ = 1028941090.

The previous prime is 1028941063. The next prime is 1028941157. The reversal of 1028941091 is 1901498201.

1028941091 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 is an emirp because it is prime and its reverse (1901498201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1028941091 - 2¹⁸ = 1028678947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028941021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514470545 + 514470546.

It is an arithmetic number, because the mean of its divisors is an integer number (514470546).

Almost surely, 2^1028941091 is an apocalyptic number.

1028941091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028941091 is an equidigital number, since it uses as much as digits as its factorization.

1028941091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1028941091 is about 32077.1116374277. Note that the first 3 decimals coincide. The cubic root of 1028941091 is about 1009.5554332058. Note that the first 3 decimals are identical.

The spelling of 1028941091 in words is "one billion, twenty-eight million, nine hundred forty-one thousand, ninety-one".