8103388621 has 4 divisors (see below), whose sum is σ = 8103837600. Its totient is φ = 8102939644.

The previous prime is 8103388619. The next prime is 8103388649. The reversal of 8103388621 is 1268833018.

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 an emirpimes, since its reverse is a distinct semiprime: 1268833018 = 2 ⋅634416509.

It is a cyclic number.

It is not a de Polignac number, because 8103388621 - 2¹ = 8103388619 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 (8103388651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196231 + ... + 233908.

It is an arithmetic number, because the mean of its divisors is an integer number (2025959400).

Almost surely, 2^8103388621 is an apocalyptic number.

It is an amenable number.

8103388621 is a deficient number, since it is larger than the sum of its proper divisors (448979).

8103388621 is a wasteful number, since it uses less digits than its factorization.

8103388621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448978.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 8103388621 is about 90018.8237037121. The cubic root of 8103388621 is about 2008.5788673195.

The spelling of 8103388621 in words is "eight billion, one hundred three million, three hundred eighty-eight thousand, six hundred twenty-one".