64843133 has 2 divisors, whose sum is σ = 64843134. Its totient is φ = 64843132.

The previous prime is 64843091. The next prime is 64843147. The reversal of 64843133 is 33134846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 1194649 = 7978^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 64843133 - 2¹⁰ = 64842109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64843133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64843633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32421566 + 32421567.

It is an arithmetic number, because the mean of its divisors is an integer number (32421567).

Almost surely, 2^64843133 is an apocalyptic number.

It is an amenable number.

64843133 is a deficient number, since it is larger than the sum of its proper divisors (1).

64843133 is an equidigital number, since it uses as much as digits as its factorization.

64843133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 64843133 is about 8052.5233933221. The cubic root of 64843133 is about 401.7488695776.

Adding to 64843133 its reverse (33134846), we get a palindrome (97977979).

The spelling of 64843133 in words is "sixty-four million, eight hundred forty-three thousand, one hundred thirty-three".