64816897 has 2 divisors, whose sum is σ = 64816898. Its totient is φ = 64816896.

The previous prime is 64816891. The next prime is 64816909. The reversal of 64816897 is 79861846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 15241216 = 7041^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 64816897 - 2¹⁹ = 64292609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64816897.

It is not a weakly prime, because it can be changed into another prime (64816891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32408448 + 32408449.

It is an arithmetic number, because the mean of its divisors is an integer number (32408449).

Almost surely, 2^64816897 is an apocalyptic number.

It is an amenable number.

64816897 is a deficient number, since it is larger than the sum of its proper divisors (1).

64816897 is an equidigital number, since it uses as much as digits as its factorization.

64816897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 64816897 is about 8050.8941739412. The cubic root of 64816897 is about 401.6946787701.

The spelling of 64816897 in words is "sixty-four million, eight hundred sixteen thousand, eight hundred ninety-seven".