1090055209 has 2 divisors, whose sum is σ = 1090055210. Its totient is φ = 1090055208.

The previous prime is 1090055191. The next prime is 1090055273. The reversal of 1090055209 is 9025500901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 970634025 + 119421184 = 31155^2 + 10928^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090055209 - 2¹⁹ = 1089530921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1090055279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545027604 + 545027605.

It is an arithmetic number, because the mean of its divisors is an integer number (545027605).

Almost surely, 2^1090055209 is an apocalyptic number.

It is an amenable number.

1090055209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090055209 is an equidigital number, since it uses as much as digits as its factorization.

1090055209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 1090055209 is about 33015.9841440476. The cubic root of 1090055209 is about 1029.1598417908.

The spelling of 1090055209 in words is "one billion, ninety million, fifty-five thousand, two hundred nine".