90934821823 has 2 divisors, whose sum is σ = 90934821824. Its totient is φ = 90934821822.

The previous prime is 90934821781. The next prime is 90934821833. The reversal of 90934821823 is 32812843909.

It is a strong prime.

It is an emirp because it is prime and its reverse (32812843909) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90934821823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90934821833) 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, 45467410911 + 45467410912.

It is an arithmetic number, because the mean of its divisors is an integer number (45467410912).

Almost surely, 2^90934821823 is an apocalyptic number.

90934821823 is a deficient number, since it is larger than the sum of its proper divisors (1).

90934821823 is an equidigital number, since it uses as much as digits as its factorization.

90934821823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 90934821823 in words is "ninety billion, nine hundred thirty-four million, eight hundred twenty-one thousand, eight hundred twenty-three".