90895059809 has 2 divisors, whose sum is σ = 90895059810. Its totient is φ = 90895059808.

The previous prime is 90895059799. The next prime is 90895059811.

90895059809 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81812016784 + 9083043025 = 286028^2 + 95305^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90895059809 is a prime.

It is a Sophie Germain prime.

Together with 90895059811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90805059809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45447529904 + 45447529905.

It is an arithmetic number, because the mean of its divisors is an integer number (45447529905).

Almost surely, 2^90895059809 is an apocalyptic number.

It is an amenable number.

90895059809 is a deficient number, since it is larger than the sum of its proper divisors (1).

90895059809 is an equidigital number, since it uses as much as digits as its factorization.

90895059809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 62.

The spelling of 90895059809 in words is "ninety billion, eight hundred ninety-five million, fifty-nine thousand, eight hundred nine".