91345679317 has 4 divisors (see below), whose sum is σ = 91434279456. Its totient is φ = 91257079180.

The previous prime is 91345679309. The next prime is 91345679323. The reversal of 91345679317 is 71397654319.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71397654319 = 232961 ⋅306479.

It is a cyclic number.

It is not a de Polignac number, because 91345679317 - 2³ = 91345679309 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 (91345679387) 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, 44298523 + ... + 44300584.

It is an arithmetic number, because the mean of its divisors is an integer number (22858569864).

Almost surely, 2^91345679317 is an apocalyptic number.

It is an amenable number.

91345679317 is a deficient number, since it is larger than the sum of its proper divisors (88600139).

91345679317 is a wasteful number, since it uses less digits than its factorization.

91345679317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88600138.

The product of its digits is 4286520, while the sum is 55.

The spelling of 91345679317 in words is "ninety-one billion, three hundred forty-five million, six hundred seventy-nine thousand, three hundred seventeen".