1217171143 has 2 divisors, whose sum is σ = 1217171144. Its totient is φ = 1217171142.

The previous prime is 1217171107. The next prime is 1217171147. The reversal of 1217171143 is 3411717121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1217171143 - 2⁹ = 1217170631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217171147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608585571 + 608585572.

It is an arithmetic number, because the mean of its divisors is an integer number (608585572).

Almost surely, 2^1217171143 is an apocalyptic number.

1217171143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217171143 is an equidigital number, since it uses as much as digits as its factorization.

1217171143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 28.

The square root of 1217171143 is about 34887.9799214572. The cubic root of 1217171143 is about 1067.7032118114.

Adding to 1217171143 its reverse (3411717121), we get a palindrome (4628888264).

The spelling of 1217171143 in words is "one billion, two hundred seventeen million, one hundred seventy-one thousand, one hundred forty-three".