90084639 has 8 divisors (see below), whose sum is σ = 121030272. Its totient is φ = 59597720.

The previous prime is 90084611. The next prime is 90084661. The reversal of 90084639 is 93648009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90084639 - 2²⁰ = 89036063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90084597 and 90084606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90084679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114219 + ... + 115004.

It is an arithmetic number, because the mean of its divisors is an integer number (15128784).

Almost surely, 2^90084639 is an apocalyptic number.

90084639 is a deficient number, since it is larger than the sum of its proper divisors (30945633).

90084639 is a wasteful number, since it uses less digits than its factorization.

90084639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229357.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 90084639 is about 9491.2927991923. The cubic root of 90084639 is about 448.2809127208.

The spelling of 90084639 in words is "ninety million, eighty-four thousand, six hundred thirty-nine".