91343318985973 has 4 divisors (see below), whose sum is σ = 91343355251328. Its totient is φ = 91343282720620.

The previous prime is 91343318985953. The next prime is 91343318985979. The reversal of 91343318985973 is 37958981334319.

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 91343318985973 - 2⁴¹ = 89144295730421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91343318985896 and 91343318985905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91343318985979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14047813 + ... + 19494298.

It is an arithmetic number, because the mean of its divisors is an integer number (22835838812832).

Almost surely, 2^{91343318985973} is an apocalyptic number.

It is an amenable number.

91343318985973 is a deficient number, since it is larger than the sum of its proper divisors (36265355).

91343318985973 is a wasteful number, since it uses less digits than its factorization.

91343318985973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36265354.

The product of its digits is 529079040, while the sum is 73.

The spelling of 91343318985973 in words is "ninety-one trillion, three hundred forty-three billion, three hundred eighteen million, nine hundred eighty-five thousand, nine hundred seventy-three".