81038671 has 8 divisors (see below), whose sum is σ = 92962080. Its totient is φ = 69201888.

The previous prime is 81038647. The next prime is 81038693. The reversal of 81038671 is 17683018.

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

It is not a de Polignac number, because 81038671 - 2⁷ = 81038543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81038611) 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, 19636 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (11620260).

Almost surely, 2^81038671 is an apocalyptic number.

81038671 is a deficient number, since it is larger than the sum of its proper divisors (11923409).

81038671 is a wasteful number, since it uses less digits than its factorization.

81038671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43313.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 81038671 is about 9002.1481325293. The cubic root of 81038671 is about 432.7437159808.

The spelling of 81038671 in words is "eighty-one million, thirty-eight thousand, six hundred seventy-one".