3686868349 has 4 divisors (see below), whose sum is σ = 3687003936. Its totient is φ = 3686732764.

The previous prime is 3686868337. The next prime is 3686868391. The reversal of 3686868349 is 9438686863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9438686863 = 127 ⋅74320369.

It is a cyclic number.

It is not a de Polignac number, because 3686868349 - 2¹⁷ = 3686737277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686868949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11329 + ... + 86614.

It is an arithmetic number, because the mean of its divisors is an integer number (921750984).

Almost surely, 2^3686868349 is an apocalyptic number.

It is an amenable number.

3686868349 is a deficient number, since it is larger than the sum of its proper divisors (135587).

3686868349 is an equidigital number, since it uses as much as digits as its factorization.

3686868349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135586.

The product of its digits is 35831808, while the sum is 61.

The square root of 3686868349 is about 60719.5878526856. The cubic root of 3686868349 is about 1544.8484330252.

The spelling of 3686868349 in words is "three billion, six hundred eighty-six million, eight hundred sixty-eight thousand, three hundred forty-nine".