9181891342 has 16 divisors (see below), whose sum is σ = 14920058160. Its totient is φ = 4237793976.

The previous prime is 9181891319. The next prime is 9181891361. The reversal of 9181891342 is 2431981819.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9181891292 and 9181891301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040428 + ... + 1049215.

It is an arithmetic number, because the mean of its divisors is an integer number (932503635).

Almost surely, 2^9181891342 is an apocalyptic number.

9181891342 is a deficient number, since it is larger than the sum of its proper divisors (5738166818).

9181891342 is a wasteful number, since it uses less digits than its factorization.

9181891342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089684 (or 2089658 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 9181891342 is about 95822.1860635625. The cubic root of 9181891342 is about 2094.0034024782.

The spelling of 9181891342 in words is "nine billion, one hundred eighty-one million, eight hundred ninety-one thousand, three hundred forty-two".