83636521 has 2 divisors, whose sum is σ = 83636522. Its totient is φ = 83636520.

The previous prime is 83636507. The next prime is 83636563. The reversal of 83636521 is 12563638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46730896 + 36905625 = 6836^2 + 6075^2 .

It is a cyclic number.

It is not a de Polignac number, because 83636521 - 2⁵ = 83636489 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (83636221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41818260 + 41818261.

It is an arithmetic number, because the mean of its divisors is an integer number (41818261).

Almost surely, 2^83636521 is an apocalyptic number.

It is an amenable number.

83636521 is a deficient number, since it is larger than the sum of its proper divisors (1).

83636521 is an equidigital number, since it uses as much as digits as its factorization.

83636521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 83636521 is about 9145.3004871355. The cubic root of 83636521 is about 437.3193088936.

It can be divided in two parts, 8363 and 6521, that added together give a square (14884 = 122²).

The spelling of 83636521 in words is "eighty-three million, six hundred thirty-six thousand, five hundred twenty-one".