4639189 has 2 divisors, whose sum is σ = 4639190. Its totient is φ = 4639188.

The previous prime is 4639139. The next prime is 4639237. The reversal of 4639189 is 9819364.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 1067089 = 1890^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 4639189 - 2⁹ = 4638677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4639139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319594 + 2319595.

It is an arithmetic number, because the mean of its divisors is an integer number (2319595).

Almost surely, 2^4639189 is an apocalyptic number.

It is an amenable number.

4639189 is a deficient number, since it is larger than the sum of its proper divisors (1).

4639189 is an equidigital number, since it uses as much as digits as its factorization.

4639189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 4639189 is about 2153.8776659783. The cubic root of 4639189 is about 166.7813002479.

The spelling of 4639189 in words is "four million, six hundred thirty-nine thousand, one hundred eighty-nine".