1217947433629 has 2 divisors, whose sum is σ = 1217947433630. Its totient is φ = 1217947433628.

The previous prime is 1217947433627. The next prime is 1217947433741. The reversal of 1217947433629 is 9263347497121.

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., 987244934404 + 230702499225 = 993602^2 + 480315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217947433629 - 2¹ = 1217947433627 is a prime.

Together with 1217947433627, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217947433627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608973716814 + 608973716815.

It is an arithmetic number, because the mean of its divisors is an integer number (608973716815).

Almost surely, 2^{1217947433629} is an apocalyptic number.

It is an amenable number.

1217947433629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217947433629 is an equidigital number, since it uses as much as digits as its factorization.

1217947433629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 58.

The spelling of 1217947433629 in words is "one trillion, two hundred seventeen billion, nine hundred forty-seven million, four hundred thirty-three thousand, six hundred twenty-nine".