86526521 has 2 divisors, whose sum is σ = 86526522. Its totient is φ = 86526520.

The previous prime is 86526511. The next prime is 86526553. The reversal of 86526521 is 12562568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64577296 + 21949225 = 8036^2 + 4685^2 .

It is a cyclic number.

It is not a de Polignac number, because 86526521 - 2¹⁰ = 86525497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86526511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43263260 + 43263261.

It is an arithmetic number, because the mean of its divisors is an integer number (43263261).

Almost surely, 2^86526521 is an apocalyptic number.

It is an amenable number.

86526521 is a deficient number, since it is larger than the sum of its proper divisors (1).

86526521 is an equidigital number, since it uses as much as digits as its factorization.

86526521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The square root of 86526521 is about 9301.9632873926. The cubic root of 86526521 is about 442.2994650300.

The spelling of 86526521 in words is "eighty-six million, five hundred twenty-six thousand, five hundred twenty-one".