64444273 has 2 divisors, whose sum is σ = 64444274. Its totient is φ = 64444272.

The previous prime is 64444267. The next prime is 64444283. The reversal of 64444273 is 37244446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47568609 + 16875664 = 6897^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 64444273 - 2²¹ = 62347121 is a prime.

It is not a weakly prime, because it can be changed into another prime (64444213) 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, 32222136 + 32222137.

It is an arithmetic number, because the mean of its divisors is an integer number (32222137).

Almost surely, 2^64444273 is an apocalyptic number.

It is an amenable number.

64444273 is a deficient number, since it is larger than the sum of its proper divisors (1).

64444273 is an equidigital number, since it uses as much as digits as its factorization.

64444273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 34.

The square root of 64444273 is about 8027.7190409231. The cubic root of 64444273 is about 400.9234352777.

The spelling of 64444273 in words is "sixty-four million, four hundred forty-four thousand, two hundred seventy-three".