90635 has 4 divisors (see below), whose sum is σ = 108768. Its totient is φ = 72504.

The previous prime is 90631. The next prime is 90641. The reversal of 90635 is 53609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90635 - 2² = 90631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90635.

It is not an unprimeable number, because it can be changed into a prime (90631) 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, 9059 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (27192).

2⁹⁰⁶³⁵ is an apocalyptic number.

90635 is a deficient number, since it is larger than the sum of its proper divisors (18133).

90635 is a wasteful number, since it uses less digits than its factorization.

90635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18132.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 90635 is about 301.0564731076. The cubic root of 90635 is about 44.9191965574.

The spelling of 90635 in words is "ninety thousand, six hundred thirty-five".