71791427 has 2 divisors, whose sum is σ = 71791428. Its totient is φ = 71791426.

The previous prime is 71791417. The next prime is 71791429. The reversal of 71791427 is 72419717.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71791427 - 2⁴ = 71791411 is a prime.

Together with 71791429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71791429) 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, 35895713 + 35895714.

It is an arithmetic number, because the mean of its divisors is an integer number (35895714).

Almost surely, 2^71791427 is an apocalyptic number.

71791427 is a deficient number, since it is larger than the sum of its proper divisors (1).

71791427 is an equidigital number, since it uses as much as digits as its factorization.

71791427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 38.

The square root of 71791427 is about 8472.9821786665. The cubic root of 71791427 is about 415.6146637488.

The spelling of 71791427 in words is "seventy-one million, seven hundred ninety-one thousand, four hundred twenty-seven".