3688312321 has 4 divisors (see below), whose sum is σ = 3688490452. Its totient is φ = 3688134192.

The previous prime is 3688312301. The next prime is 3688312337. The reversal of 3688312321 is 1232138863.

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 1607127921 + 2081184400 = 40089^2 + 45620^2 .

It is a cyclic number.

It is not a de Polignac number, because 3688312321 - 2¹⁷ = 3688181249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3688312301) 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 3 ways as a sum of consecutive naturals, for example, 53190 + ... + 101023.

It is an arithmetic number, because the mean of its divisors is an integer number (922122613).

Almost surely, 2^3688312321 is an apocalyptic number.

It is an amenable number.

3688312321 is a deficient number, since it is larger than the sum of its proper divisors (178131).

3688312321 is a wasteful number, since it uses less digits than its factorization.

3688312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178130.

The product of its digits is 41472, while the sum is 37.

The square root of 3688312321 is about 60731.4771844058. The cubic root of 3688312321 is about 1545.0500880624.

The spelling of 3688312321 in words is "three billion, six hundred eighty-eight million, three hundred twelve thousand, three hundred twenty-one".