3689541985 has 4 divisors (see below), whose sum is σ = 4427450388. Its totient is φ = 2951633584.

The previous prime is 3689541949. The next prime is 3689542009. The reversal of 3689541985 is 5891459863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2361085281 + 1328456704 = 48591^2 + 36448^2 .

It is a cyclic number.

It is not a de Polignac number, because 3689541985 - 2¹⁵ = 3689509217 is a prime.

It is a super-2 number, since 2×3689541985² = 27225440118155480450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 368954194 + ... + 368954203.

It is an arithmetic number, because the mean of its divisors is an integer number (1106862597).

Almost surely, 2^3689541985 is an apocalyptic number.

It is an amenable number.

3689541985 is a deficient number, since it is larger than the sum of its proper divisors (737908403).

3689541985 is an equidigital number, since it uses as much as digits as its factorization.

3689541985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737908402.

The product of its digits is 9331200, while the sum is 58.

The square root of 3689541985 is about 60741.6001188642. The cubic root of 3689541985 is about 1545.2217728518.

The spelling of 3689541985 in words is "three billion, six hundred eighty-nine million, five hundred forty-one thousand, nine hundred eighty-five".