64478471 has 2 divisors, whose sum is σ = 64478472. Its totient is φ = 64478470.

The previous prime is 64478461. The next prime is 64478483. The reversal of 64478471 is 17487446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64478471 is a prime.

It is a super-3 number, since 3×64478471³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64478411) 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, 32239235 + 32239236.

It is an arithmetic number, because the mean of its divisors is an integer number (32239236).

Almost surely, 2^64478471 is an apocalyptic number.

64478471 is a deficient number, since it is larger than the sum of its proper divisors (1).

64478471 is an equidigital number, since it uses as much as digits as its factorization.

64478471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 64478471 is about 8029.8487532456. The cubic root of 64478471 is about 400.9943407513.

Subtracting from 64478471 its reverse (17487446), we obtain a square (46991025 = 6855²).

The spelling of 64478471 in words is "sixty-four million, four hundred seventy-eight thousand, four hundred seventy-one".