6789806421 has 4 divisors (see below), whose sum is σ = 9053075232. Its totient is φ = 4526537612.

The previous prime is 6789806417. The next prime is 6789806423. The reversal of 6789806421 is 1246089876.

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 6789806421 - 2² = 6789806417 is a prime.

It is a super-2 number, since 2×6789806421² = 92202942469305658482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6789806423) 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, 1131634401 + ... + 1131634406.

It is an arithmetic number, because the mean of its divisors is an integer number (2263268808).

Almost surely, 2^6789806421 is an apocalyptic number.

It is an amenable number.

6789806421 is a deficient number, since it is larger than the sum of its proper divisors (2263268811).

6789806421 is a wasteful number, since it uses less digits than its factorization.

6789806421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263268810.

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 6789806421 is about 82400.2816803438. The cubic root of 6789806421 is about 1893.5893290169.

The spelling of 6789806421 in words is "six billion, seven hundred eighty-nine million, eight hundred six thousand, four hundred twenty-one".