6430967721 has 12 divisors (see below), whose sum is σ = 9300258240. Its totient is φ = 4282196760.

The previous prime is 6430967713. The next prime is 6430967729. The reversal of 6430967721 is 1277690346.

It is an interprime number because it is at equal distance from previous prime (6430967713) and next prime (6430967729).

It is not a de Polignac number, because 6430967721 - 2³ = 6430967713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6430967729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418285 + ... + 433386.

It is an arithmetic number, because the mean of its divisors is an integer number (775021520).

Almost surely, 2^6430967721 is an apocalyptic number.

It is an amenable number.

6430967721 is a deficient number, since it is larger than the sum of its proper divisors (2869290519).

6430967721 is a wasteful number, since it uses less digits than its factorization.

6430967721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852516 (or 852513 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 6430967721 is about 80193.3146901910. The cubic root of 6430967721 is about 1859.6252878531.

The spelling of 6430967721 in words is "six billion, four hundred thirty million, nine hundred sixty-seven thousand, seven hundred twenty-one".