1263652213 has 2 divisors, whose sum is σ = 1263652214. Its totient is φ = 1263652212.

The previous prime is 1263652207. The next prime is 1263652237. The reversal of 1263652213 is 3122563621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983324164 + 280328049 = 31358^2 + 16743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263652213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263652283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631826106 + 631826107.

It is an arithmetic number, because the mean of its divisors is an integer number (631826107).

Almost surely, 2^1263652213 is an apocalyptic number.

It is an amenable number.

1263652213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263652213 is an equidigital number, since it uses as much as digits as its factorization.

1263652213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 1263652213 is about 35547.8861959470. The cubic root of 1263652213 is about 1081.1248605305.

The spelling of 1263652213 in words is "one billion, two hundred sixty-three million, six hundred fifty-two thousand, two hundred thirteen".