6430023921 has 4 divisors (see below), whose sum is σ = 8573365232. Its totient is φ = 4286682612.

The previous prime is 6430023913. The next prime is 6430023961. The reversal of 6430023921 is 1293200346.

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 not a de Polignac number, because 6430023921 - 2³ = 6430023913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6430023961) 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, 1071670651 + ... + 1071670656.

It is an arithmetic number, because the mean of its divisors is an integer number (2143341308).

Almost surely, 2^6430023921 is an apocalyptic number.

It is an amenable number.

6430023921 is a deficient number, since it is larger than the sum of its proper divisors (2143341311).

6430023921 is a wasteful number, since it uses less digits than its factorization.

6430023921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143341310.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 6430023921 is about 80187.4299438509. The cubic root of 6430023921 is about 1859.5343113837.

The spelling of 6430023921 in words is "six billion, four hundred thirty million, twenty-three thousand, nine hundred twenty-one".