1217853383629 has 2 divisors, whose sum is σ = 1217853383630. Its totient is φ = 1217853383628.

The previous prime is 1217853383609. The next prime is 1217853383641. The reversal of 1217853383629 is 9263833587121.

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., 1204721369604 + 13132014025 = 1097598^2 + 114595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217853383629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217853383609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608926691814 + 608926691815.

It is an arithmetic number, because the mean of its divisors is an integer number (608926691815).

Almost surely, 2^{1217853383629} is an apocalyptic number.

It is an amenable number.

1217853383629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217853383629 is an equidigital number, since it uses as much as digits as its factorization.

1217853383629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 58.

The spelling of 1217853383629 in words is "one trillion, two hundred seventeen billion, eight hundred fifty-three million, three hundred eighty-three thousand, six hundred twenty-nine".