81403327 has 8 divisors (see below), whose sum is σ = 88294752. Its totient is φ = 74745600.

The previous prime is 81403321. The next prime is 81403337. The reversal of 81403327 is 72330418.

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

It is a de Polignac number, because none of the positive numbers 2^k-81403327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81403295 and 81403304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81403321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57699 + ... + 59092.

It is an arithmetic number, because the mean of its divisors is an integer number (11036844).

Almost surely, 2^81403327 is an apocalyptic number.

81403327 is a deficient number, since it is larger than the sum of its proper divisors (6891425).

81403327 is a wasteful number, since it uses less digits than its factorization.

81403327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116849.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 81403327 is about 9022.3792316661. The cubic root of 81403327 is about 433.3918283297.

The spelling of 81403327 in words is "eighty-one million, four hundred three thousand, three hundred twenty-seven".