91969931019 has 16 divisors (see below), whose sum is σ = 127965187584. Its totient is φ = 58644273600.

The previous prime is 91969931017. The next prime is 91969931051. The reversal of 91969931019 is 91013996919.

It is not a de Polignac number, because 91969931019 - 2¹ = 91969931017 is a prime.

It is a super-3 number, since 3×91969931019³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 91969931019.

It is not an unprimeable number, because it can be changed into a prime (91969931017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2351514 + ... + 2390304.

It is an arithmetic number, because the mean of its divisors is an integer number (7997824224).

Almost surely, 2^91969931019 is an apocalyptic number.

91969931019 is a deficient number, since it is larger than the sum of its proper divisors (35995256565).

91969931019 is a wasteful number, since it uses less digits than its factorization.

91969931019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73178.

The product of its (nonzero) digits is 1062882, while the sum is 57.

The spelling of 91969931019 in words is "ninety-one billion, nine hundred sixty-nine million, nine hundred thirty-one thousand, nineteen".