90123 has 8 divisors (see below), whose sum is σ = 131136. Its totient is φ = 54600.

The previous prime is 90121. The next prime is 90127. The reversal of 90123 is 32109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90123 - 2¹ = 90121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (90121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1333 + ... + 1398.

It is an arithmetic number, because the mean of its divisors is an integer number (16392).

2⁹⁰¹²³ is an apocalyptic number.

90123 is a deficient number, since it is larger than the sum of its proper divisors (41013).

90123 is a wasteful number, since it uses less digits than its factorization.

90123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 90123 is about 300.2049300062. The cubic root of 90123 is about 44.8344534606.

The spelling of 90123 in words is "ninety thousand, one hundred twenty-three".