4289639 has 2 divisors, whose sum is σ = 4289640. Its totient is φ = 4289638.

The previous prime is 4289633. The next prime is 4289647. The reversal of 4289639 is 9369824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4289639 - 2¹² = 4285543 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4289596 and 4289605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4289633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2144819 + 2144820.

It is an arithmetic number, because the mean of its divisors is an integer number (2144820).

Almost surely, 2^4289639 is an apocalyptic number.

4289639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4289639 is an equidigital number, since it uses as much as digits as its factorization.

4289639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 4289639 is about 2071.1443696662. The cubic root of 4289639 is about 162.4826206265.

The spelling of 4289639 in words is "four million, two hundred eighty-nine thousand, six hundred thirty-nine".