91380303823 has 2 divisors, whose sum is σ = 91380303824. Its totient is φ = 91380303822.

The previous prime is 91380303797. The next prime is 91380303827. The reversal of 91380303823 is 32830308319.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91380303823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91380303827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45690151911 + 45690151912.

It is an arithmetic number, because the mean of its divisors is an integer number (45690151912).

Almost surely, 2^91380303823 is an apocalyptic number.

91380303823 is a deficient number, since it is larger than the sum of its proper divisors (1).

91380303823 is an equidigital number, since it uses as much as digits as its factorization.

91380303823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 91380303823 in words is "ninety-one billion, three hundred eighty million, three hundred three thousand, eight hundred twenty-three".