91380203873 has 4 divisors (see below), whose sum is σ = 104434518720. Its totient is φ = 78325889028.

The previous prime is 91380203867. The next prime is 91380203881. The reversal of 91380203873 is 37830208319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91380203873 - 2⁴ = 91380203857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91380203833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6527157413 + ... + 6527157426.

It is an arithmetic number, because the mean of its divisors is an integer number (26108629680).

Almost surely, 2^91380203873 is an apocalyptic number.

It is an amenable number.

91380203873 is a deficient number, since it is larger than the sum of its proper divisors (13054314847).

91380203873 is a wasteful number, since it uses less digits than its factorization.

91380203873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13054314846.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 91380203873 in words is "ninety-one billion, three hundred eighty million, two hundred three thousand, eight hundred seventy-three".