90419000809 has 2 divisors, whose sum is σ = 90419000810. Its totient is φ = 90419000808.

The previous prime is 90419000743. The next prime is 90419000843. The reversal of 90419000809 is 90800091409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61315664400 + 29103336409 = 247620^2 + 170597^2 .

It is an emirp because it is prime and its reverse (90800091409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90419000809 - 2⁹ = 90419000297 is a prime.

It is not a weakly prime, because it can be changed into another prime (90419001809) 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, 45209500404 + 45209500405.

It is an arithmetic number, because the mean of its divisors is an integer number (45209500405).

Almost surely, 2^90419000809 is an apocalyptic number.

It is an amenable number.

90419000809 is a deficient number, since it is larger than the sum of its proper divisors (1).

90419000809 is an equidigital number, since it uses as much as digits as its factorization.

90419000809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 90419000809 in words is "ninety billion, four hundred nineteen million, eight hundred nine", and thus it is an aban number.