90964595609 has 2 divisors, whose sum is σ = 90964595610. Its totient is φ = 90964595608.

The previous prime is 90964595473. The next prime is 90964595611. The reversal of 90964595609 is 90659546909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53455752025 + 37508843584 = 231205^2 + 193672^2 .

It is an emirp because it is prime and its reverse (90659546909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90964595609 - 2⁸ = 90964595353 is a prime.

It is a Sophie Germain prime.

Together with 90964595611, 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 (90964595629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45482297804 + 45482297805.

It is an arithmetic number, because the mean of its divisors is an integer number (45482297805).

Almost surely, 2^90964595609 is an apocalyptic number.

It is an amenable number.

90964595609 is a deficient number, since it is larger than the sum of its proper divisors (1).

90964595609 is an equidigital number, since it uses as much as digits as its factorization.

90964595609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23619600, while the sum is 62.

The spelling of 90964595609 in words is "ninety billion, nine hundred sixty-four million, five hundred ninety-five thousand, six hundred nine".