64520633 has 2 divisors, whose sum is σ = 64520634. Its totient is φ = 64520632.

The previous prime is 64520629. The next prime is 64520647. The reversal of 64520633 is 33602546.

64520633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53042089 + 11478544 = 7283^2 + 3388^2 .

It is a cyclic number.

It is not a de Polignac number, because 64520633 - 2² = 64520629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_3814049 and since 64520633 and 3814049 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 64520596 and 64520605.

It is not a weakly prime, because it can be changed into another prime (64520623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32260316 + 32260317.

It is an arithmetic number, because the mean of its divisors is an integer number (32260317).

Almost surely, 2^64520633 is an apocalyptic number.

It is an amenable number.

64520633 is a deficient number, since it is larger than the sum of its proper divisors (1).

64520633 is an equidigital number, since it uses as much as digits as its factorization.

64520633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 64520633 is about 8032.4736538628. The cubic root of 64520633 is about 401.0817241286.

The spelling of 64520633 in words is "sixty-four million, five hundred twenty thousand, six hundred thirty-three".