90448884509 has 2 divisors, whose sum is σ = 90448884510. Its totient is φ = 90448884508.

The previous prime is 90448884503. The next prime is 90448884527. The reversal of 90448884509 is 90548884409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84004327225 + 6444557284 = 289835^2 + 80278^2 .

It is an emirp because it is prime and its reverse (90548884409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90448884509 - 2¹⁶ = 90448818973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90448884503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45224442254 + 45224442255.

It is an arithmetic number, because the mean of its divisors is an integer number (45224442255).

Almost surely, 2^90448884509 is an apocalyptic number.

It is an amenable number.

90448884509 is a deficient number, since it is larger than the sum of its proper divisors (1).

90448884509 is an equidigital number, since it uses as much as digits as its factorization.

90448884509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13271040, while the sum is 59.

The spelling of 90448884509 in words is "ninety billion, four hundred forty-eight million, eight hundred eighty-four thousand, five hundred nine".