81096091 has 8 divisors (see below), whose sum is σ = 85065120. Its totient is φ = 77164032.

The previous prime is 81096089. The next prime is 81096097. The reversal of 81096091 is 19069018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81096091 - 2¹ = 81096089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81096097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4696 + ... + 13573.

It is an arithmetic number, because the mean of its divisors is an integer number (10633140).

Almost surely, 2^81096091 is an apocalyptic number.

81096091 is a deficient number, since it is larger than the sum of its proper divisors (3969029).

81096091 is a wasteful number, since it uses less digits than its factorization.

81096091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18485.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 81096091 is about 9005.3368065831. The cubic root of 81096091 is about 432.8458987924.

The spelling of 81096091 in words is "eighty-one million, ninety-six thousand, ninety-one".