1090270091 has 2 divisors, whose sum is σ = 1090270092. Its totient is φ = 1090270090.

The previous prime is 1090270087. The next prime is 1090270147. The reversal of 1090270091 is 1900720901.

It is a weak prime.

It is an emirp because it is prime and its reverse (1900720901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1090270091 - 2² = 1090270087 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1090270001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545135045 + 545135046.

It is an arithmetic number, because the mean of its divisors is an integer number (545135046).

Almost surely, 2^1090270091 is an apocalyptic number.

1090270091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090270091 is an equidigital number, since it uses as much as digits as its factorization.

1090270091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1090270091 is about 33019.2381953309. The cubic root of 1090270091 is about 1029.2274632572.

Adding to 1090270091 its reverse (1900720901), we get a palindrome (2990990992).

The spelling of 1090270091 in words is "one billion, ninety million, two hundred seventy thousand, ninety-one".