1209048817 has 2 divisors, whose sum is σ = 1209048818. Its totient is φ = 1209048816.

The previous prime is 1209048761. The next prime is 1209048829. The reversal of 1209048817 is 7188409021.

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., 1192735296 + 16313521 = 34536^2 + 4039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209048817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1209048817.

It is not a weakly prime, because it can be changed into another prime (1209048317) 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, 604524408 + 604524409.

It is an arithmetic number, because the mean of its divisors is an integer number (604524409).

Almost surely, 2^1209048817 is an apocalyptic number.

It is an amenable number.

1209048817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209048817 is an equidigital number, since it uses as much as digits as its factorization.

1209048817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1209048817 is about 34771.3792795167. The cubic root of 1209048817 is about 1065.3229396753.

The spelling of 1209048817 in words is "one billion, two hundred nine million, forty-eight thousand, eight hundred seventeen".