6424722921 has 8 divisors (see below), whose sum is σ = 8587243360. Its totient is φ = 4272675552.

The previous prime is 6424722907. The next prime is 6424722949. The reversal of 6424722921 is 1292274246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6424722921 - 2⁷ = 6424722793 is a prime.

It is a super-2 number, since 2×6424722921² = 82554129223245544482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6424722921.

It is not an unprimeable number, because it can be changed into a prime (6424722961) 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 7 ways as a sum of consecutive naturals, for example, 2616835 + ... + 2619288.

It is an arithmetic number, because the mean of its divisors is an integer number (1073405420).

Almost surely, 2^6424722921 is an apocalyptic number.

It is an amenable number.

6424722921 is a deficient number, since it is larger than the sum of its proper divisors (2162520439).

6424722921 is a wasteful number, since it uses less digits than its factorization.

6424722921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236535.

The product of its digits is 96768, while the sum is 39.

The square root of 6424722921 is about 80154.3693194576. The cubic root of 6424722921 is about 1859.0231623531.

The spelling of 6424722921 in words is "six billion, four hundred twenty-four million, seven hundred twenty-two thousand, nine hundred twenty-one".