63865471 has 2 divisors, whose sum is σ = 63865472. Its totient is φ = 63865470.

The previous prime is 63865469. The next prime is 63865489. The reversal of 63865471 is 17456836.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63865471 - 2¹ = 63865469 is a prime.

It is a super-3 number, since 3×63865471³ (a number of 24 digits) contains 333 as substring.

Together with 63865469, it forms a pair of twin primes.

It is equal to p_3777556 and since 63865471 and 3777556 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63860471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31932735 + 31932736.

It is an arithmetic number, because the mean of its divisors is an integer number (31932736).

Almost surely, 2^63865471 is an apocalyptic number.

63865471 is a deficient number, since it is larger than the sum of its proper divisors (1).

63865471 is an equidigital number, since it uses as much as digits as its factorization.

63865471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 63865471 is about 7991.5875143804. The cubic root of 63865471 is about 399.7195346439.

The spelling of 63865471 in words is "sixty-three million, eight hundred sixty-five thousand, four hundred seventy-one".