1189965653 has 2 divisors, whose sum is σ = 1189965654. Its totient is φ = 1189965652.

The previous prime is 1189965641. The next prime is 1189965683. The reversal of 1189965653 is 3565699811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 882208804 + 307756849 = 29702^2 + 17543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189965653 - 2⁶ = 1189965589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1189965595 and 1189965604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1189965683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594982826 + 594982827.

It is an arithmetic number, because the mean of its divisors is an integer number (594982827).

Almost surely, 2^1189965653 is an apocalyptic number.

It is an amenable number.

1189965653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189965653 is an equidigital number, since it uses as much as digits as its factorization.

1189965653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 53.

The square root of 1189965653 is about 34495.8787828343. The cubic root of 1189965653 is about 1059.6883066585.

The spelling of 1189965653 in words is "one billion, one hundred eighty-nine million, nine hundred sixty-five thousand, six hundred fifty-three".