65829521 has 2 divisors, whose sum is σ = 65829522. Its totient is φ = 65829520.

The previous prime is 65829481. The next prime is 65829527. The reversal of 65829521 is 12592856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61465600 + 4363921 = 7840^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 65829521 - 2¹⁸ = 65567377 is a prime.

It is not a weakly prime, because it can be changed into another prime (65829527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32914760 + 32914761.

It is an arithmetic number, because the mean of its divisors is an integer number (32914761).

Almost surely, 2^65829521 is an apocalyptic number.

It is an amenable number.

65829521 is a deficient number, since it is larger than the sum of its proper divisors (1).

65829521 is an equidigital number, since it uses as much as digits as its factorization.

65829521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 38.

The square root of 65829521 is about 8113.5393633112. The cubic root of 65829521 is about 403.7757492356.

The spelling of 65829521 in words is "sixty-five million, eight hundred twenty-nine thousand, five hundred twenty-one".