1210209853 has 2 divisors, whose sum is σ = 1210209854. Its totient is φ = 1210209852.

The previous prime is 1210209779. The next prime is 1210209859. The reversal of 1210209853 is 3589020121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209509284 + 700569 = 34778^2 + 837^2 .

It is an emirp because it is prime and its reverse (3589020121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210209853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210209859) 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, 605104926 + 605104927.

It is an arithmetic number, because the mean of its divisors is an integer number (605104927).

Almost surely, 2^1210209853 is an apocalyptic number.

It is an amenable number.

1210209853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210209853 is an equidigital number, since it uses as much as digits as its factorization.

1210209853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1210209853 is about 34788.0705558673. The cubic root of 1210209853 is about 1065.6638364635.

Adding to 1210209853 its reverse (3589020121), we get a palindrome (4799229974).

The spelling of 1210209853 in words is "one billion, two hundred ten million, two hundred nine thousand, eight hundred fifty-three".