3686773621 has 2 divisors, whose sum is σ = 3686773622. Its totient is φ = 3686773620.

The previous prime is 3686773613. The next prime is 3686773667. The reversal of 3686773621 is 1263776863.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3627652900 + 59120721 = 60230^2 + 7689^2 .

It is an emirp because it is prime and its reverse (1263776863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3686773621 - 2³ = 3686773613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3686773681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843386810 + 1843386811.

It is an arithmetic number, because the mean of its divisors is an integer number (1843386811).

Almost surely, 2^3686773621 is an apocalyptic number.

It is an amenable number.

3686773621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686773621 is an equidigital number, since it uses as much as digits as its factorization.

3686773621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 49.

The square root of 3686773621 is about 60718.8078028546. The cubic root of 3686773621 is about 1544.8352021345.

The spelling of 3686773621 in words is "three billion, six hundred eighty-six million, seven hundred seventy-three thousand, six hundred twenty-one".