4189432921 has 2 divisors, whose sum is σ = 4189432922. Its totient is φ = 4189432920.

The previous prime is 4189432903. The next prime is 4189432979. The reversal of 4189432921 is 1292349814.

4189432921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2627997696 + 1561435225 = 51264^2 + 39515^2 .

It is a cyclic number.

It is not a de Polignac number, because 4189432921 - 2⁵ = 4189432889 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (4189432901) 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 as a sum of consecutive naturals, namely, 2094716460 + 2094716461.

It is an arithmetic number, because the mean of its divisors is an integer number (2094716461).

Almost surely, 2^4189432921 is an apocalyptic number.

It is an amenable number.

4189432921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4189432921 is an equidigital number, since it uses as much as digits as its factorization.

4189432921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 4189432921 is about 64725.8288552568. The cubic root of 4189432921 is about 1612.0743963072.

The spelling of 4189432921 in words is "four billion, one hundred eighty-nine million, four hundred thirty-two thousand, nine hundred twenty-one".