64904533 has 2 divisors, whose sum is σ = 64904534. Its totient is φ = 64904532.

The previous prime is 64904531. The next prime is 64904557. The reversal of 64904533 is 33540946.

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., 64352484 + 552049 = 8022^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 64904533 - 2¹ = 64904531 is a prime.

Together with 64904531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64904531) 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, 32452266 + 32452267.

It is an arithmetic number, because the mean of its divisors is an integer number (32452267).

Almost surely, 2^64904533 is an apocalyptic number.

It is an amenable number.

64904533 is a deficient number, since it is larger than the sum of its proper divisors (1).

64904533 is an equidigital number, since it uses as much as digits as its factorization.

64904533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 64904533 is about 8056.3349607622. The cubic root of 64904533 is about 401.8756349866.

The spelling of 64904533 in words is "sixty-four million, nine hundred four thousand, five hundred thirty-three".