7830432421 has 4 divisors (see below), whose sum is σ = 8949065632. Its totient is φ = 6711799212.

The previous prime is 7830432413. The next prime is 7830432457. The reversal of 7830432421 is 1242340387.

7830432421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7830432421 - 2³ = 7830432413 is a prime.

It is a super-2 number, since 2×7830432421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7830402421) 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 3 ways as a sum of consecutive naturals, for example, 559316595 + ... + 559316608.

It is an arithmetic number, because the mean of its divisors is an integer number (2237266408).

Almost surely, 2^7830432421 is an apocalyptic number.

It is an amenable number.

7830432421 is a deficient number, since it is larger than the sum of its proper divisors (1118633211).

7830432421 is a wasteful number, since it uses less digits than its factorization.

7830432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118633210.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 7830432421 is about 88489.7305962675. The cubic root of 7830432421 is about 1985.7683385295.

The spelling of 7830432421 in words is "seven billion, eight hundred thirty million, four hundred thirty-two thousand, four hundred twenty-one".