550090909 has 2 divisors, whose sum is σ = 550090910. Its totient is φ = 550090908.

The previous prime is 550090897. The next prime is 550090921. The reversal of 550090909 is 909090055.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (550090897) and next prime (550090921).

It can be written as a sum of positive squares in only one way, i.e., 543915684 + 6175225 = 23322^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 550090909 - 2⁷ = 550090781 is a prime.

550090909 is a modest number, since divided by 90909 gives 550 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550090969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275045454 + 275045455.

It is an arithmetic number, because the mean of its divisors is an integer number (275045455).

Almost surely, 2^550090909 is an apocalyptic number.

It is an amenable number.

550090909 is a deficient number, since it is larger than the sum of its proper divisors (1).

550090909 is an equidigital number, since it uses as much as digits as its factorization.

550090909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 550090909 is about 23454.0169054258. The cubic root of 550090909 is about 819.3664097364.

The spelling of 550090909 in words is "five hundred fifty million, ninety thousand, nine hundred nine".