65364821 has 2 divisors, whose sum is σ = 65364822. Its totient is φ = 65364820.

The previous prime is 65364799. The next prime is 65364823. The reversal of 65364821 is 12846356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 8059921 = 7570^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 65364821 - 2⁶ = 65364757 is a prime.

Together with 65364823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65364823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32682410 + 32682411.

It is an arithmetic number, because the mean of its divisors is an integer number (32682411).

Almost surely, 2^65364821 is an apocalyptic number.

It is an amenable number.

65364821 is a deficient number, since it is larger than the sum of its proper divisors (1).

65364821 is an equidigital number, since it uses as much as digits as its factorization.

65364821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 65364821 is about 8084.8513282558. The cubic root of 65364821 is about 402.8234012078.

The spelling of 65364821 in words is "sixty-five million, three hundred sixty-four thousand, eight hundred twenty-one".