649432271 has 2 divisors, whose sum is σ = 649432272. Its totient is φ = 649432270.

The previous prime is 649432211. The next prime is 649432297. The reversal of 649432271 is 172234946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649432271 - 2⁶ = 649432207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649432211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324716135 + 324716136.

It is an arithmetic number, because the mean of its divisors is an integer number (324716136).

Almost surely, 2^649432271 is an apocalyptic number.

649432271 is a deficient number, since it is larger than the sum of its proper divisors (1).

649432271 is an equidigital number, since it uses as much as digits as its factorization.

649432271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 649432271 is about 25483.9610539649. The cubic root of 649432271 is about 865.9868323606.

The spelling of 649432271 in words is "six hundred forty-nine million, four hundred thirty-two thousand, two hundred seventy-one".