64918897 has 2 divisors, whose sum is σ = 64918898. Its totient is φ = 64918896.

The previous prime is 64918879. The next prime is 64918963. The reversal of 64918897 is 79881946.

It is a happy number.

Together with previous prime (64918879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64786401 + 132496 = 8049^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 64918897 - 2¹¹ = 64916849 is a prime.

It is not a weakly prime, because it can be changed into another prime (64918817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32459448 + 32459449.

It is an arithmetic number, because the mean of its divisors is an integer number (32459449).

Almost surely, 2^64918897 is an apocalyptic number.

It is an amenable number.

64918897 is a deficient number, since it is larger than the sum of its proper divisors (1).

64918897 is an equidigital number, since it uses as much as digits as its factorization.

64918897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 64918897 is about 8057.2263838122. The cubic root of 64918897 is about 401.9052791197.

The spelling of 64918897 in words is "sixty-four million, nine hundred eighteen thousand, eight hundred ninety-seven".