64988897 has 2 divisors, whose sum is σ = 64988898. Its totient is φ = 64988896.

The previous prime is 64988887. The next prime is 64988939. The reversal of 64988897 is 79888946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34562641 + 30426256 = 5879^2 + 5516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64988897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64988857) 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, 32494448 + 32494449.

It is an arithmetic number, because the mean of its divisors is an integer number (32494449).

Almost surely, 2^64988897 is an apocalyptic number.

It is an amenable number.

64988897 is a deficient number, since it is larger than the sum of its proper divisors (1).

64988897 is an equidigital number, since it uses as much as digits as its factorization.

64988897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 59.

The square root of 64988897 is about 8061.5691400620. The cubic root of 64988897 is about 402.0496811614.

The spelling of 64988897 in words is "sixty-four million, nine hundred eighty-eight thousand, eight hundred ninety-seven".