90539 has 4 divisors (see below), whose sum is σ = 93024. Its totient is φ = 88056.

The previous prime is 90533. The next prime is 90547. The reversal of 90539 is 93509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93509 = 13 ⋅7193.

It is a cyclic number.

It is not a de Polignac number, because 90539 - 2⁴ = 90523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (90533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (23256).

2⁹⁰⁵³⁹ is an apocalyptic number.

90539 is a deficient number, since it is larger than the sum of its proper divisors (2485).

90539 is a wasteful number, since it uses less digits than its factorization.

90539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 90539 is about 300.8969923412. The cubic root of 90539 is about 44.9033315815.

The spelling of 90539 in words is "ninety thousand, five hundred thirty-nine".