391327271 has 2 divisors, whose sum is σ = 391327272. Its totient is φ = 391327270.

The previous prime is 391327253. The next prime is 391327289. The reversal of 391327271 is 172723193.

It is a balanced prime because it is at equal distance from previous prime (391327253) and next prime (391327289).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391327271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391327201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195663635 + 195663636.

It is an arithmetic number, because the mean of its divisors is an integer number (195663636).

Almost surely, 2^391327271 is an apocalyptic number.

391327271 is a deficient number, since it is larger than the sum of its proper divisors (1).

391327271 is an equidigital number, since it uses as much as digits as its factorization.

391327271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 391327271 is about 19781.9936052967. The cubic root of 391327271 is about 731.4422422361.

The spelling of 391327271 in words is "three hundred ninety-one million, three hundred twenty-seven thousand, two hundred seventy-one".