91893986443 has 16 divisors (see below), whose sum is σ = 105390176256. Its totient is φ = 78490077120.

The previous prime is 91893986417. The next prime is 91893986467. The reversal of 91893986443 is 34468939819.

It is not a de Polignac number, because 91893986443 - 2¹³ = 91893978251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91893980443) 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, 12114630 + ... + 12122212.

It is an arithmetic number, because the mean of its divisors is an integer number (6586886016).

Almost surely, 2^91893986443 is an apocalyptic number.

91893986443 is a deficient number, since it is larger than the sum of its proper divisors (13496189813).

91893986443 is a wasteful number, since it uses less digits than its factorization.

91893986443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13434.

The product of its digits is 40310784, while the sum is 64.

The spelling of 91893986443 in words is "ninety-one billion, eight hundred ninety-three million, nine hundred eighty-six thousand, four hundred forty-three".