64433321 has 2 divisors, whose sum is σ = 64433322. Its totient is φ = 64433320.

The previous prime is 64433261. The next prime is 64433329. The reversal of 64433321 is 12333446.

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., 51552400 + 12880921 = 7180^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 64433321 - 2²² = 60239017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (64433329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32216660 + 32216661.

It is an arithmetic number, because the mean of its divisors is an integer number (32216661).

Almost surely, 2^64433321 is an apocalyptic number.

It is an amenable number.

64433321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64433321 is an equidigital number, since it uses as much as digits as its factorization.

64433321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 26.

The square root of 64433321 is about 8027.0368754603. The cubic root of 64433321 is about 400.9007223092.

Adding to 64433321 its reverse (12333446), we get a palindrome (76766767).

The spelling of 64433321 in words is "sixty-four million, four hundred thirty-three thousand, three hundred twenty-one".