90223806173 has 4 divisors (see below), whose sum is σ = 90691287228. Its totient is φ = 89756325120.

The previous prime is 90223806151. The next prime is 90223806181. The reversal of 90223806173 is 37160832209.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48955102564 + 41268703609 = 221258^2 + 203147^2 .

It is a cyclic number.

It is not a de Polignac number, because 90223806173 - 2⁶ = 90223806109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90223806173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90223806073) 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, 233740238 + ... + 233740623.

It is an arithmetic number, because the mean of its divisors is an integer number (22672821807).

Almost surely, 2^90223806173 is an apocalyptic number.

It is an amenable number.

90223806173 is a deficient number, since it is larger than the sum of its proper divisors (467481055).

90223806173 is a wasteful number, since it uses less digits than its factorization.

90223806173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467481054.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 90223806173 in words is "ninety billion, two hundred twenty-three million, eight hundred six thousand, one hundred seventy-three".