3685775789 has 2 divisors, whose sum is σ = 3685775790. Its totient is φ = 3685775788.

The previous prime is 3685775777. The next prime is 3685775887. The reversal of 3685775789 is 9875775863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2949576100 + 736199689 = 54310^2 + 27133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3685775789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685775749) 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, 1842887894 + 1842887895.

It is an arithmetic number, because the mean of its divisors is an integer number (1842887895).

Almost surely, 2^3685775789 is an apocalyptic number.

It is an amenable number.

3685775789 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685775789 is an equidigital number, since it uses as much as digits as its factorization.

3685775789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88905600, while the sum is 65.

The square root of 3685775789 is about 60710.5904188058. The cubic root of 3685775789 is about 1544.6958187380.

The spelling of 3685775789 in words is "three billion, six hundred eighty-five million, seven hundred seventy-five thousand, seven hundred eighty-nine".