64457249 has 2 divisors, whose sum is σ = 64457250. Its totient is φ = 64457248.

The previous prime is 64457243. The next prime is 64457287. The reversal of 64457249 is 94275446.

64457249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 14684224 = 7055^2 + 3832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64457249 is a prime.

It is not a weakly prime, because it can be changed into another prime (64457243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32228624 + 32228625.

It is an arithmetic number, because the mean of its divisors is an integer number (32228625).

Almost surely, 2^64457249 is an apocalyptic number.

It is an amenable number.

64457249 is a deficient number, since it is larger than the sum of its proper divisors (1).

64457249 is an equidigital number, since it uses as much as digits as its factorization.

64457249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 64457249 is about 8028.5271999290. The cubic root of 64457249 is about 400.9503424184.

The spelling of 64457249 in words is "sixty-four million, four hundred fifty-seven thousand, two hundred forty-nine".