64430503 has 2 divisors, whose sum is σ = 64430504. Its totient is φ = 64430502.

The previous prime is 64430497. The next prime is 64430533. The reversal of 64430503 is 30503446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64430503 - 2⁹ = 64429991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64430533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32215251 + 32215252.

It is an arithmetic number, because the mean of its divisors is an integer number (32215252).

Almost surely, 2^64430503 is an apocalyptic number.

64430503 is a deficient number, since it is larger than the sum of its proper divisors (1).

64430503 is an equidigital number, since it uses as much as digits as its factorization.

64430503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 64430503 is about 8026.8613417699. The cubic root of 64430503 is about 400.8948777416.

Adding to 64430503 its reverse (30503446), we get a palindrome (94933949).

The spelling of 64430503 in words is "sixty-four million, four hundred thirty thousand, five hundred three".