64315633 has 2 divisors, whose sum is σ = 64315634. Its totient is φ = 64315632.

The previous prime is 64315631. The next prime is 64315637. The reversal of 64315633 is 33651346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61277584 + 3038049 = 7828^2 + 1743^2 .

It is a cyclic number.

It is not a de Polignac number, because 64315633 - 2¹ = 64315631 is a prime.

Together with 64315631, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 64315595 and 64315604.

It is not a weakly prime, because it can be changed into another prime (64315631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32157816 + 32157817.

It is an arithmetic number, because the mean of its divisors is an integer number (32157817).

Almost surely, 2^64315633 is an apocalyptic number.

It is an amenable number.

64315633 is a deficient number, since it is larger than the sum of its proper divisors (1).

64315633 is an equidigital number, since it uses as much as digits as its factorization.

64315633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 31.

The square root of 64315633 is about 8019.7027999796. The cubic root of 64315633 is about 400.6564907104.

Adding to 64315633 its reverse (33651346), we get a palindrome (97966979).

The spelling of 64315633 in words is "sixty-four million, three hundred fifteen thousand, six hundred thirty-three".