3689613891 has 12 divisors (see below), whose sum is σ = 5343509080. Its totient is φ = 2453250240.

The previous prime is 3689613869. The next prime is 3689613899. The reversal of 3689613891 is 1983169863.

It is not a de Polignac number, because 3689613891 - 2¹⁴ = 3689597507 is a prime.

It is a super-2 number, since 2×3689613891² = 27226501329320319762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3689613899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 537430 + ... + 544251.

Almost surely, 2^3689613891 is an apocalyptic number.

3689613891 is a deficient number, since it is larger than the sum of its proper divisors (1653895189).

3689613891 is a wasteful number, since it uses less digits than its factorization.

3689613891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082066 (or 1082063 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 3689613891 is about 60742.1920167522. The cubic root of 3689613891 is about 1545.2318111344.

The spelling of 3689613891 in words is "three billion, six hundred eighty-nine million, six hundred thirteen thousand, eight hundred ninety-one".