90417 has 4 divisors (see below), whose sum is σ = 120560. Its totient is φ = 60276.

The previous prime is 90407. The next prime is 90437. The reversal of 90417 is 71409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90417 - 2⁴ = 90401 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 90393 and 90402.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15067 + ... + 15072.

It is an arithmetic number, because the mean of its divisors is an integer number (30140).

2⁹⁰⁴¹⁷ is an apocalyptic number.

It is an amenable number.

90417 is a deficient number, since it is larger than the sum of its proper divisors (30143).

90417 is a wasteful number, since it uses less digits than its factorization.

90417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30142.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 90417 is about 300.6941968180. The cubic root of 90417 is about 44.8831536512.

The spelling of 90417 in words is "ninety thousand, four hundred seventeen".