64403671 has 2 divisors, whose sum is σ = 64403672. Its totient is φ = 64403670.

The previous prime is 64403653. The next prime is 64403699. The reversal of 64403671 is 17630446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64403671 - 2⁷ = 64403543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64403641) 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, 32201835 + 32201836.

It is an arithmetic number, because the mean of its divisors is an integer number (32201836).

Almost surely, 2^64403671 is an apocalyptic number.

64403671 is a deficient number, since it is larger than the sum of its proper divisors (1).

64403671 is an equidigital number, since it uses as much as digits as its factorization.

64403671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 64403671 is about 8025.1897796875. The cubic root of 64403671 is about 400.8392192961.

The spelling of 64403671 in words is "sixty-four million, four hundred three thousand, six hundred seventy-one".