64977833 has 2 divisors, whose sum is σ = 64977834. Its totient is φ = 64977832.

The previous prime is 64977827. The next prime is 64977877. The reversal of 64977833 is 33877946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56145049 + 8832784 = 7493^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 64977833 - 2¹⁸ = 64715689 is a prime.

It is not a weakly prime, because it can be changed into another prime (64977823) 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, 32488916 + 32488917.

It is an arithmetic number, because the mean of its divisors is an integer number (32488917).

Almost surely, 2^64977833 is an apocalyptic number.

It is an amenable number.

64977833 is a deficient number, since it is larger than the sum of its proper divisors (1).

64977833 is an equidigital number, since it uses as much as digits as its factorization.

64977833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The square root of 64977833 is about 8060.8828920907. The cubic root of 64977833 is about 402.0268642889.

The spelling of 64977833 in words is "sixty-four million, nine hundred seventy-seven thousand, eight hundred thirty-three".