91310931093 has 16 divisors (see below), whose sum is σ = 122024797056. Its totient is φ = 60735616320.

The previous prime is 91310931091. The next prime is 91310931133. The reversal of 91310931093 is 39013901319.

It is not a de Polignac number, because 91310931093 - 2¹ = 91310931091 is a prime.

It is a super-2 number, since 2×91310931093² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91310931091) 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 15 ways as a sum of consecutive naturals, for example, 3819688 + ... + 3843518.

It is an arithmetic number, because the mean of its divisors is an integer number (7626549816).

Almost surely, 2^91310931093 is an apocalyptic number.

It is an amenable number.

91310931093 is a deficient number, since it is larger than the sum of its proper divisors (30713865963).

91310931093 is a wasteful number, since it uses less digits than its factorization.

91310931093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26684.

The product of its (nonzero) digits is 19683, while the sum is 39.

The spelling of 91310931093 in words is "ninety-one billion, three hundred ten million, nine hundred thirty-one thousand, ninety-three".