4289239 has 2 divisors, whose sum is σ = 4289240. Its totient is φ = 4289238.

The previous prime is 4289213. The next prime is 4289249. The reversal of 4289239 is 9329824.

4289239 = 843² + 844² + ... + 848².

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4289239 - 2⁷ = 4289111 is a prime.

4289239 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4289198 and 4289207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4289249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2144619 + 2144620.

It is an arithmetic number, because the mean of its divisors is an integer number (2144620).

Almost surely, 2^4289239 is an apocalyptic number.

4289239 is a deficient number, since it is larger than the sum of its proper divisors (1).

4289239 is an equidigital number, since it uses as much as digits as its factorization.

4289239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 4289239 is about 2071.0478024420. The cubic root of 4289239 is about 162.4775700797.

The spelling of 4289239 in words is "four million, two hundred eighty-nine thousand, two hundred thirty-nine".