990239 has 2 divisors, whose sum is σ = 990240. Its totient is φ = 990238.

The previous prime is 990211. The next prime is 990259. The reversal of 990239 is 932099.

990239 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990239 - 2¹² = 986143 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495119 + 495120.

It is an arithmetic number, because the mean of its divisors is an integer number (495120).

2⁹⁹⁰²³⁹ is an apocalyptic number.

990239 is a deficient number, since it is larger than the sum of its proper divisors (1).

990239 is an equidigital number, since it uses as much as digits as its factorization.

990239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 990239 is about 995.1075318778. The cubic root of 990239 is about 99.6735689203.

The spelling of 990239 in words is "nine hundred ninety thousand, two hundred thirty-nine".