649341271 has 2 divisors, whose sum is σ = 649341272. Its totient is φ = 649341270.

The previous prime is 649341269. The next prime is 649341281. The reversal of 649341271 is 172143946.

649341271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649341271 - 2¹ = 649341269 is a prime.

Together with 649341269, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 649341271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649341281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324670635 + 324670636.

It is an arithmetic number, because the mean of its divisors is an integer number (324670636).

Almost surely, 2^649341271 is an apocalyptic number.

649341271 is a deficient number, since it is larger than the sum of its proper divisors (1).

649341271 is an equidigital number, since it uses as much as digits as its factorization.

649341271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 649341271 is about 25482.1755546892. The cubic root of 649341271 is about 865.9463824239.

The spelling of 649341271 in words is "six hundred forty-nine million, three hundred forty-one thousand, two hundred seventy-one".