65321603 has 2 divisors, whose sum is σ = 65321604. Its totient is φ = 65321602.

The previous prime is 65321579. The next prime is 65321611. The reversal of 65321603 is 30612356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65321603 - 2²⁴ = 48544387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65321623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32660801 + 32660802.

It is an arithmetic number, because the mean of its divisors is an integer number (32660802).

Almost surely, 2^65321603 is an apocalyptic number.

65321603 is a deficient number, since it is larger than the sum of its proper divisors (1).

65321603 is an equidigital number, since it uses as much as digits as its factorization.

65321603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 65321603 is about 8082.1781098909. The cubic root of 65321603 is about 402.7346018619.

Adding to 65321603 its reverse (30612356), we get a palindrome (95933959).

The spelling of 65321603 in words is "sixty-five million, three hundred twenty-one thousand, six hundred three".