81608127 has 8 divisors (see below), whose sum is σ = 109213440. Its totient is φ = 54204120.

The previous prime is 81608123. The next prime is 81608159. The reversal of 81608127 is 72180618.

It is a happy number.

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

It is not a de Polignac number, because 81608127 - 2² = 81608123 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81608123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49377 + ... + 51002.

It is an arithmetic number, because the mean of its divisors is an integer number (13651680).

Almost surely, 2^81608127 is an apocalyptic number.

81608127 is a deficient number, since it is larger than the sum of its proper divisors (27605313).

81608127 is a wasteful number, since it uses less digits than its factorization.

81608127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100653.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 81608127 is about 9033.7216583200. The cubic root of 81608127 is about 433.7549761213.

The spelling of 81608127 in words is "eighty-one million, six hundred eight thousand, one hundred twenty-seven".