81095193 has 12 divisors (see below), whose sum is σ = 118233648. Its totient is φ = 53557560.

The previous prime is 81095191. The next prime is 81095221. The reversal of 81095193 is 39159018.

It is a happy number.

It is not a de Polignac number, because 81095193 - 2¹ = 81095191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81095191) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 41143 + ... + 43068.

It is an arithmetic number, because the mean of its divisors is an integer number (9852804).

Almost surely, 2^81095193 is an apocalyptic number.

It is an amenable number.

81095193 is a deficient number, since it is larger than the sum of its proper divisors (37138455).

81095193 is a wasteful number, since it uses less digits than its factorization.

81095193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84324 (or 84321 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 81095193 is about 9005.2869471217. The cubic root of 81095193 is about 432.8443011114.

The spelling of 81095193 in words is "eighty-one million, ninety-five thousand, one hundred ninety-three".