1217958671 has 2 divisors, whose sum is σ = 1217958672. Its totient is φ = 1217958670.

The previous prime is 1217958649. The next prime is 1217958769. The reversal of 1217958671 is 1768597121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1217958671 - 2¹⁰ = 1217957647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217958641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608979335 + 608979336.

It is an arithmetic number, because the mean of its divisors is an integer number (608979336).

Almost surely, 2^1217958671 is an apocalyptic number.

1217958671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217958671 is an equidigital number, since it uses as much as digits as its factorization.

1217958671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 47.

The square root of 1217958671 is about 34899.2646197595. The cubic root of 1217958671 is about 1067.9334355008.

The spelling of 1217958671 in words is "one billion, two hundred seventeen million, nine hundred fifty-eight thousand, six hundred seventy-one".