64897471 has 2 divisors, whose sum is σ = 64897472. Its totient is φ = 64897470.

The previous prime is 64897433. The next prime is 64897487. The reversal of 64897471 is 17479846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64897471 - 2¹⁷ = 64766399 is a prime.

It is a super-3 number, since 3×64897471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64897411) 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, 32448735 + 32448736.

It is an arithmetic number, because the mean of its divisors is an integer number (32448736).

Almost surely, 2^64897471 is an apocalyptic number.

64897471 is a deficient number, since it is larger than the sum of its proper divisors (1).

64897471 is an equidigital number, since it uses as much as digits as its factorization.

64897471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 64897471 is about 8055.8966602111. The cubic root of 64897471 is about 401.8610589699.

The spelling of 64897471 in words is "sixty-four million, eight hundred ninety-seven thousand, four hundred seventy-one".