90637 has 4 divisors (see below), whose sum is σ = 91260. Its totient is φ = 90016.

The previous prime is 90631. The next prime is 90641. The reversal of 90637 is 73609.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19881 + 70756 = 141^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 90637 - 2¹¹ = 88589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90637.

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, 39 + ... + 427.

It is an arithmetic number, because the mean of its divisors is an integer number (22815).

2⁹⁰⁶³⁷ is an apocalyptic number.

It is an amenable number.

90637 is a deficient number, since it is larger than the sum of its proper divisors (623).

90637 is a wasteful number, since it uses less digits than its factorization.

90637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 90637 is about 301.0597947252. The cubic root of 90637 is about 44.9195269586.

It can be divided in two parts, 90 and 637, that added together give a palindrome (727).

The spelling of 90637 in words is "ninety thousand, six hundred thirty-seven".