90359221 has 4 divisors (see below), whose sum is σ = 90543744. Its totient is φ = 90174700.

The previous prime is 90359219. The next prime is 90359237. The reversal of 90359221 is 12295309.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90359221 - 2¹ = 90359219 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90359201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91525 + ... + 92506.

It is an arithmetic number, because the mean of its divisors is an integer number (22635936).

Almost surely, 2^90359221 is an apocalyptic number.

It is an amenable number.

90359221 is a deficient number, since it is larger than the sum of its proper divisors (184523).

90359221 is a wasteful number, since it uses less digits than its factorization.

90359221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184522.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 90359221 is about 9505.7467355279. The cubic root of 90359221 is about 448.7359108246.

The spelling of 90359221 in words is "ninety million, three hundred fifty-nine thousand, two hundred twenty-one".