90389321 has 8 divisors (see below), whose sum is σ = 99032544. Its totient is φ = 81817120.

The previous prime is 90389309. The next prime is 90389363. The reversal of 90389321 is 12398309.

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

It is not a de Polignac number, because 90389321 - 2²² = 86195017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90389371) 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, 15071 + ... + 20196.

It is an arithmetic number, because the mean of its divisors is an integer number (12379068).

Almost surely, 2^90389321 is an apocalyptic number.

It is an amenable number.

90389321 is a deficient number, since it is larger than the sum of its proper divisors (8643223).

90389321 is a wasteful number, since it uses less digits than its factorization.

90389321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35511.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 90389321 is about 9507.3298564844. The cubic root of 90389321 is about 448.7857321609.

The spelling of 90389321 in words is "ninety million, three hundred eighty-nine thousand, three hundred twenty-one".