1217416643 has 2 divisors, whose sum is σ = 1217416644. Its totient is φ = 1217416642.

The previous prime is 1217416633. The next prime is 1217416691. The reversal of 1217416643 is 3466147121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3466147121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217416643 - 2⁶ = 1217416579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1217416633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608708321 + 608708322.

It is an arithmetic number, because the mean of its divisors is an integer number (608708322).

Almost surely, 2^1217416643 is an apocalyptic number.

1217416643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217416643 is an equidigital number, since it uses as much as digits as its factorization.

1217416643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 1217416643 is about 34891.4981478297. The cubic root of 1217416643 is about 1067.7749912318.

The spelling of 1217416643 in words is "one billion, two hundred seventeen million, four hundred sixteen thousand, six hundred forty-three".