717172427 has 2 divisors, whose sum is σ = 717172428. Its totient is φ = 717172426.

The previous prime is 717172403. The next prime is 717172433. The reversal of 717172427 is 724271717.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-717172427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (717142427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358586213 + 358586214.

It is an arithmetic number, because the mean of its divisors is an integer number (358586214).

Almost surely, 2^717172427 is an apocalyptic number.

717172427 is a deficient number, since it is larger than the sum of its proper divisors (1).

717172427 is an equidigital number, since it uses as much as digits as its factorization.

717172427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38416, while the sum is 38.

The square root of 717172427 is about 26780.0751866010. The cubic root of 717172427 is about 895.1061230965.

The spelling of 717172427 in words is "seven hundred seventeen million, one hundred seventy-two thousand, four hundred twenty-seven".