81096147 has 32 divisors (see below), whose sum is σ = 132721920. Its totient is φ = 49134600.

The previous prime is 81096143. The next prime is 81096163. The reversal of 81096147 is 74169018.

It is not a de Polignac number, because 81096147 - 2² = 81096143 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (81096143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22372 + ... + 25742.

It is an arithmetic number, because the mean of its divisors is an integer number (4147560).

Almost surely, 2^81096147 is an apocalyptic number.

81096147 is a deficient number, since it is larger than the sum of its proper divisors (51625773).

81096147 is an equidigital number, since it uses as much as digits as its factorization.

81096147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 81096147 is about 9005.3399158499. The cubic root of 81096147 is about 432.8459984247.

The spelling of 81096147 in words is "eighty-one million, ninety-six thousand, one hundred forty-seven".