86725647 has 20 divisors (see below), whose sum is σ = 131202720. Its totient is φ = 57081024.

The previous prime is 86725643. The next prime is 86725673. The reversal of 86725647 is 74652768.

86725647 is a `hidden beast` number, since 86 + 7 + 2 + 564 + 7 = 666.

It is not a de Polignac number, because 86725647 - 2² = 86725643 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86725643) 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 19 ways as a sum of consecutive naturals, for example, 378 + ... + 13175.

It is an arithmetic number, because the mean of its divisors is an integer number (6560136).

Almost surely, 2^86725647 is an apocalyptic number.

86725647 is a deficient number, since it is larger than the sum of its proper divisors (44477073).

86725647 is a wasteful number, since it uses less digits than its factorization.

86725647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13644 (or 13635 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 86725647 is about 9312.6605757968. The cubic root of 86725647 is about 442.6384972967.

The spelling of 86725647 in words is "eighty-six million, seven hundred twenty-five thousand, six hundred forty-seven".