81008027 has 8 divisors (see below), whose sum is σ = 82672800. Its totient is φ = 79358400.

The previous prime is 81008021. The next prime is 81008029. The reversal of 81008027 is 72080018.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81008027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81007987 and 81008005.

It is not an unprimeable number, because it can be changed into a prime (81008021) 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 7 ways as a sum of consecutive naturals, for example, 7349 + ... + 14697.

It is an arithmetic number, because the mean of its divisors is an integer number (10334100).

Almost surely, 2^81008027 is an apocalyptic number.

81008027 is the 7349-th pentagonal number.

81008027 is a deficient number, since it is larger than the sum of its proper divisors (1664773).

81008027 is a wasteful number, since it uses less digits than its factorization.

81008027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7573.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 81008027 is about 9000.4459333969. The cubic root of 81008027 is about 432.6891631353.

The spelling of 81008027 in words is "eighty-one million, eight thousand, twenty-seven".