64478833 has 2 divisors, whose sum is σ = 64478834. Its totient is φ = 64478832.

The previous prime is 64478779. The next prime is 64478839. The reversal of 64478833 is 33887446.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62204769 + 2274064 = 7887^2 + 1508^2 .

It is a cyclic number.

It is not a de Polignac number, because 64478833 - 2¹³ = 64470641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64478833.

It is not a weakly prime, because it can be changed into another prime (64478839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32239416 + 32239417.

It is an arithmetic number, because the mean of its divisors is an integer number (32239417).

Almost surely, 2^64478833 is an apocalyptic number.

It is an amenable number.

64478833 is a deficient number, since it is larger than the sum of its proper divisors (1).

64478833 is an equidigital number, since it uses as much as digits as its factorization.

64478833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 43.

The square root of 64478833 is about 8029.8712941118. The cubic root of 64478833 is about 400.9950911810.

The spelling of 64478833 in words is "sixty-four million, four hundred seventy-eight thousand, eight hundred thirty-three".