64449337 has 2 divisors, whose sum is σ = 64449338. Its totient is φ = 64449336.

The previous prime is 64449293. The next prime is 64449347. The reversal of 64449337 is 73394446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64336441 + 112896 = 8021^2 + 336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64449337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64449337.

It is not a weakly prime, because it can be changed into another prime (64449347) 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, 32224668 + 32224669.

It is an arithmetic number, because the mean of its divisors is an integer number (32224669).

Almost surely, 2^64449337 is an apocalyptic number.

It is an amenable number.

64449337 is a deficient number, since it is larger than the sum of its proper divisors (1).

64449337 is an equidigital number, since it uses as much as digits as its factorization.

64449337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 40.

The square root of 64449337 is about 8028.0344418793. The cubic root of 64449337 is about 400.9339364596.

The spelling of 64449337 in words is "sixty-four million, four hundred forty-nine thousand, three hundred thirty-seven".