64895687 has 2 divisors, whose sum is σ = 64895688. Its totient is φ = 64895686.

The previous prime is 64895653. The next prime is 64895689. The reversal of 64895687 is 78659846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64895687 is a prime.

It is a super-2 number, since 2×64895687² = 8422900382403938, which contains 22 as substring.

Together with 64895689, 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 (64895689) 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, 32447843 + 32447844.

It is an arithmetic number, because the mean of its divisors is an integer number (32447844).

Almost surely, 2^64895687 is an apocalyptic number.

64895687 is a deficient number, since it is larger than the sum of its proper divisors (1).

64895687 is an equidigital number, since it uses as much as digits as its factorization.

64895687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The square root of 64895687 is about 8055.7859331042. The cubic root of 64895687 is about 401.8573766143.

The spelling of 64895687 in words is "sixty-four million, eight hundred ninety-five thousand, six hundred eighty-seven".