90639093 has 8 divisors (see below), whose sum is σ = 120896608. Its totient is φ = 60403824.

The previous prime is 90639047. The next prime is 90639119. The reversal of 90639093 is 39093609.

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

It is not a de Polignac number, because 90639093 - 2¹⁷ = 90508021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90639023) 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, 10971 + ... + 17367.

It is an arithmetic number, because the mean of its divisors is an integer number (15112076).

Almost surely, 2^90639093 is an apocalyptic number.

It is an amenable number.

90639093 is a deficient number, since it is larger than the sum of its proper divisors (30257515).

90639093 is a wasteful number, since it uses less digits than its factorization.

90639093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123.

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 90639093 is about 9520.4565541785. The cubic root of 90639093 is about 449.1987271818.

The spelling of 90639093 in words is "ninety million, six hundred thirty-nine thousand, ninety-three".