65460821 has 2 divisors, whose sum is σ = 65460822. Its totient is φ = 65460820.

The previous prime is 65460797. The next prime is 65460839. The reversal of 65460821 is 12806456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65431921 + 28900 = 8089^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 65460821 - 2¹⁴ = 65444437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65460721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32730410 + 32730411.

It is an arithmetic number, because the mean of its divisors is an integer number (32730411).

Almost surely, 2^65460821 is an apocalyptic number.

It is an amenable number.

65460821 is a deficient number, since it is larger than the sum of its proper divisors (1).

65460821 is an equidigital number, since it uses as much as digits as its factorization.

65460821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 65460821 is about 8090.7861793524. The cubic root of 65460821 is about 403.0205109556.

The spelling of 65460821 in words is "sixty-five million, four hundred sixty thousand, eight hundred twenty-one".