1084121509 has 2 divisors, whose sum is σ = 1084121510. Its totient is φ = 1084121508.

The previous prime is 1084121419. The next prime is 1084121527. The reversal of 1084121509 is 9051214801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708730884 + 375390625 = 26622^2 + 19375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1084121509 - 2⁹ = 1084120997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1084121579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542060754 + 542060755.

It is an arithmetic number, because the mean of its divisors is an integer number (542060755).

Almost surely, 2^1084121509 is an apocalyptic number.

It is an amenable number.

1084121509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084121509 is an equidigital number, since it uses as much as digits as its factorization.

1084121509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1084121509 is about 32926.0005011237. Note that the first 3 decimals coincide. The cubic root of 1084121509 is about 1027.2890374624.

The spelling of 1084121509 in words is "one billion, eighty-four million, one hundred twenty-one thousand, five hundred nine".