90447 has 16 divisors (see below), whose sum is σ = 142080. Its totient is φ = 50112.

The previous prime is 90439. The next prime is 90469. The reversal of 90447 is 74409.

It is not a de Polignac number, because 90447 - 2³ = 90439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (8880).

2⁹⁰⁴⁴⁷ is an apocalyptic number.

90447 is a deficient number, since it is larger than the sum of its proper divisors (51633).

90447 is a wasteful number, since it uses less digits than its factorization.

90447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 90447 is about 300.7440772484. The cubic root of 90447 is about 44.8881171194. Note that the first 3 decimals are identical.

The spelling of 90447 in words is "ninety thousand, four hundred forty-seven".