91342042973 has 4 divisors (see below), whose sum is σ = 91375056960. Its totient is φ = 91309028988.

The previous prime is 91342042949. The next prime is 91342043011. The reversal of 91342042973 is 37924024319.

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 a de Polignac number, because none of the positive numbers 2^k-91342042973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91342042943) 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, 16502843 + ... + 16508376.

It is an arithmetic number, because the mean of its divisors is an integer number (22843764240).

Almost surely, 2^91342042973 is an apocalyptic number.

It is an amenable number.

91342042973 is a deficient number, since it is larger than the sum of its proper divisors (33013987).

91342042973 is a wasteful number, since it uses less digits than its factorization.

91342042973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33013986.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 91342042973 in words is "ninety-one billion, three hundred forty-two million, forty-two thousand, nine hundred seventy-three".