90239 has 2 divisors, whose sum is σ = 90240. Its totient is φ = 90238.

The previous prime is 90227. The next prime is 90247. The reversal of 90239 is 93209.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90239 - 2⁸ = 89983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45119 + 45120.

It is an arithmetic number, because the mean of its divisors is an integer number (45120).

2⁹⁰²³⁹ is an apocalyptic number.

90239 is a deficient number, since it is larger than the sum of its proper divisors (1).

90239 is an equidigital number, since it uses as much as digits as its factorization.

90239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 90239 is about 300.3980692348. The cubic root of 90239 is about 44.8536811340.

The spelling of 90239 in words is "ninety thousand, two hundred thirty-nine".