90218124673 has 2 divisors, whose sum is σ = 90218124674. Its totient is φ = 90218124672.

The previous prime is 90218124637. The next prime is 90218124679. The reversal of 90218124673 is 37642181209.

Together with previous prime (90218124637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77956548849 + 12261575824 = 279207^2 + 110732^2 .

It is a cyclic number.

It is not a de Polignac number, because 90218124673 - 2¹³ = 90218116481 is a prime.

It is not a weakly prime, because it can be changed into another prime (90218124679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45109062336 + 45109062337.

It is an arithmetic number, because the mean of its divisors is an integer number (45109062337).

Almost surely, 2^90218124673 is an apocalyptic number.

It is an amenable number.

90218124673 is a deficient number, since it is larger than the sum of its proper divisors (1).

90218124673 is an equidigital number, since it uses as much as digits as its factorization.

90218124673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 90218124673 in words is "ninety billion, two hundred eighteen million, one hundred twenty-four thousand, six hundred seventy-three".