64684271 has 2 divisors, whose sum is σ = 64684272. Its totient is φ = 64684270.

The previous prime is 64684253. The next prime is 64684273. The reversal of 64684271 is 17248646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64684271 - 2²² = 60489967 is a prime.

Together with 64684273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64684273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32342135 + 32342136.

It is an arithmetic number, because the mean of its divisors is an integer number (32342136).

Almost surely, 2^64684271 is an apocalyptic number.

64684271 is a deficient number, since it is larger than the sum of its proper divisors (1).

64684271 is an equidigital number, since it uses as much as digits as its factorization.

64684271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 64684271 is about 8042.6532313659. The cubic root of 64684271 is about 401.4205139619.

The spelling of 64684271 in words is "sixty-four million, six hundred eighty-four thousand, two hundred seventy-one".