64430533 has 2 divisors, whose sum is σ = 64430534. Its totient is φ = 64430532.

The previous prime is 64430503. The next prime is 64430549. The reversal of 64430533 is 33503446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63728289 + 702244 = 7983^2 + 838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64430533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64430503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32215266 + 32215267.

It is an arithmetic number, because the mean of its divisors is an integer number (32215267).

Almost surely, 2^64430533 is an apocalyptic number.

It is an amenable number.

64430533 is a deficient number, since it is larger than the sum of its proper divisors (1).

64430533 is an equidigital number, since it uses as much as digits as its factorization.

64430533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 64430533 is about 8026.8632104951. The cubic root of 64430533 is about 400.8949399629.

Adding to 64430533 its reverse (33503446), we get a palindrome (97933979).

The spelling of 64430533 in words is "sixty-four million, four hundred thirty thousand, five hundred thirty-three".