6809530621 has 4 divisors (see below), whose sum is σ = 6809896000. Its totient is φ = 6809165244.

The previous prime is 6809530619. The next prime is 6809530639. The reversal of 6809530621 is 1260359086.

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.

It is a cyclic number.

It is not a de Polignac number, because 6809530621 - 2¹ = 6809530619 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 (6809530681) 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, 153141 + ... + 192538.

It is an arithmetic number, because the mean of its divisors is an integer number (1702474000).

Almost surely, 2^6809530621 is an apocalyptic number.

It is an amenable number.

6809530621 is a deficient number, since it is larger than the sum of its proper divisors (365379).

6809530621 is a wasteful number, since it uses less digits than its factorization.

6809530621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365378.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6809530621 is about 82519.8801562387. The cubic root of 6809530621 is about 1895.4211645721.

The spelling of 6809530621 in words is "six billion, eight hundred nine million, five hundred thirty thousand, six hundred twenty-one".