86651439 has 16 divisors (see below), whose sum is σ = 132218112. Its totient is φ = 49448448.

The previous prime is 86651413. The next prime is 86651443. The reversal of 86651439 is 93415668.

It is not a de Polignac number, because 86651439 - 2⁸ = 86651183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86651439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86651459) 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 15 ways as a sum of consecutive naturals, for example, 16207 + ... + 20879.

It is an arithmetic number, because the mean of its divisors is an integer number (8263632).

Almost surely, 2^86651439 is an apocalyptic number.

86651439 is a deficient number, since it is larger than the sum of its proper divisors (45566673).

86651439 is a wasteful number, since it uses less digits than its factorization.

86651439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566.

The product of its digits is 155520, while the sum is 42.

The square root of 86651439 is about 9308.6754696896. The cubic root of 86651439 is about 442.5122113519.

The spelling of 86651439 in words is "eighty-six million, six hundred fifty-one thousand, four hundred thirty-nine".