65300021 has 2 divisors, whose sum is σ = 65300022. Its totient is φ = 65300020.

The previous prime is 65299999. The next prime is 65300029. The reversal of 65300021 is 12000356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34939921 + 30360100 = 5911^2 + 5510^2 .

It is a cyclic number.

It is not a de Polignac number, because 65300021 - 2⁶ = 65299957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65300029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32650010 + 32650011.

It is an arithmetic number, because the mean of its divisors is an integer number (32650011).

Almost surely, 2^65300021 is an apocalyptic number.

It is an amenable number.

65300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

65300021 is an equidigital number, since it uses as much as digits as its factorization.

65300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 65300021 is about 8080.8428397043. The cubic root of 65300021 is about 402.6902430015.

Adding to 65300021 its reverse (12000356), we get a palindrome (77300377).

The spelling of 65300021 in words is "sixty-five million, three hundred thousand, twenty-one".