86781047 has 8 divisors (see below), whose sum is σ = 90651744. Its totient is φ = 82918528.

The previous prime is 86781043. The next prime is 86781067. The reversal of 86781047 is 74018768.

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

It is a cyclic number.

It is not a de Polignac number, because 86781047 - 2² = 86781043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86780995 and 86781013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86781043) 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, 31643 + ... + 34275.

It is an arithmetic number, because the mean of its divisors is an integer number (11331468).

Almost surely, 2^86781047 is an apocalyptic number.

86781047 is a deficient number, since it is larger than the sum of its proper divisors (3870697).

86781047 is a wasteful number, since it uses less digits than its factorization.

86781047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 86781047 is about 9315.6345462883. The cubic root of 86781047 is about 442.7327291412.

The spelling of 86781047 in words is "eighty-six million, seven hundred eighty-one thousand, forty-seven".