3686536121 has 2 divisors, whose sum is σ = 3686536122. Its totient is φ = 3686536120.

The previous prime is 3686536081. The next prime is 3686536141. The reversal of 3686536121 is 1216356863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2448270400 + 1238265721 = 49480^2 + 35189^2 .

It is a cyclic number.

It is not a de Polignac number, because 3686536121 - 2¹⁴ = 3686519737 is a prime.

It is not a weakly prime, because it can be changed into another prime (3686536141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843268060 + 1843268061.

It is an arithmetic number, because the mean of its divisors is an integer number (1843268061).

Almost surely, 2^3686536121 is an apocalyptic number.

It is an amenable number.

3686536121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686536121 is an equidigital number, since it uses as much as digits as its factorization.

3686536121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 3686536121 is about 60716.8520346699. The cubic root of 3686536121 is about 1544.8020289342.

The spelling of 3686536121 in words is "three billion, six hundred eighty-six million, five hundred thirty-six thousand, one hundred twenty-one".