90550 has 12 divisors (see below), whose sum is σ = 168516. Its totient is φ = 36200.

The previous prime is 90547. The next prime is 90583. The reversal of 90550 is 5509.

It is an Ulam number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 856 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (14043).

2⁹⁰⁵⁵⁰ is an apocalyptic number.

90550 is a deficient number, since it is larger than the sum of its proper divisors (77966).

90550 is a wasteful number, since it uses less digits than its factorization.

90550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 90550 is about 300.9152704666. The cubic root of 90550 is about 44.9051500120.

The spelling of 90550 in words is "ninety thousand, five hundred fifty".