64471447 has 2 divisors, whose sum is σ = 64471448. Its totient is φ = 64471446.

The previous prime is 64471441. The next prime is 64471481. The reversal of 64471447 is 74417446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64471447 - 2³ = 64471439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64471441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32235723 + 32235724.

It is an arithmetic number, because the mean of its divisors is an integer number (32235724).

Almost surely, 2^64471447 is an apocalyptic number.

64471447 is a deficient number, since it is larger than the sum of its proper divisors (1).

64471447 is an equidigital number, since it uses as much as digits as its factorization.

64471447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 37.

The square root of 64471447 is about 8029.4113731954. The cubic root of 64471447 is about 400.9797793715.

The spelling of 64471447 in words is "sixty-four million, four hundred seventy-one thousand, four hundred forty-seven".