64982257 has 2 divisors, whose sum is σ = 64982258. Its totient is φ = 64982256.

The previous prime is 64982237. The next prime is 64982287. The reversal of 64982257 is 75228946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62078641 + 2903616 = 7879^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 64982257 - 2¹⁹ = 64457969 is a prime.

It is not a weakly prime, because it can be changed into another prime (64982207) 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, 32491128 + 32491129.

It is an arithmetic number, because the mean of its divisors is an integer number (32491129).

Almost surely, 2^64982257 is an apocalyptic number.

It is an amenable number.

64982257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64982257 is an equidigital number, since it uses as much as digits as its factorization.

64982257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 64982257 is about 8061.1572990483. The cubic root of 64982257 is about 402.0359880490.

The spelling of 64982257 in words is "sixty-four million, nine hundred eighty-two thousand, two hundred fifty-seven".