64449863 has 2 divisors, whose sum is σ = 64449864. Its totient is φ = 64449862.

The previous prime is 64449857. The next prime is 64449877. The reversal of 64449863 is 36894446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64449863 - 2⁶ = 64449799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64449823) 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, 32224931 + 32224932.

It is an arithmetic number, because the mean of its divisors is an integer number (32224932).

Almost surely, 2^64449863 is an apocalyptic number.

64449863 is a deficient number, since it is larger than the sum of its proper divisors (1).

64449863 is an equidigital number, since it uses as much as digits as its factorization.

64449863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The square root of 64449863 is about 8028.0672020107. The cubic root of 64449863 is about 400.9350271906.

The spelling of 64449863 in words is "sixty-four million, four hundred forty-nine thousand, eight hundred sixty-three".