4000189 has 2 divisors, whose sum is σ = 4000190. Its totient is φ = 4000188.

The previous prime is 4000169. The next prime is 4000237. The reversal of 4000189 is 9810004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 20164 = 1995^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000189 - 2¹³ = 3991997 is a prime.

4000189 is a modest number, since divided by 189 gives 4 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000094 + 2000095.

It is an arithmetic number, because the mean of its divisors is an integer number (2000095).

Almost surely, 2^4000189 is an apocalyptic number.

It is an amenable number.

4000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000189 is an equidigital number, since it uses as much as digits as its factorization.

4000189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 4000189 is about 2000.0472494419. The cubic root of 4000189 is about 158.7426053141.

The spelling of 4000189 in words is "four million, one hundred eighty-nine", and thus it is an aban number.