86786139 has 16 divisors (see below), whose sum is σ = 133660800. Its totient is φ = 49503360.

The previous prime is 86786131. The next prime is 86786159. The reversal of 86786139 is 93168768.

It is not a de Polignac number, because 86786139 - 2³ = 86786131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86786131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76789 + ... + 77910.

It is an arithmetic number, because the mean of its divisors is an integer number (8353800).

Almost surely, 2^86786139 is an apocalyptic number.

86786139 is a deficient number, since it is larger than the sum of its proper divisors (46874661).

86786139 is a wasteful number, since it uses less digits than its factorization.

86786139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154730.

The product of its digits is 435456, while the sum is 48.

The square root of 86786139 is about 9315.9078462595. The cubic root of 86786139 is about 442.7413882937.

The spelling of 86786139 in words is "eighty-six million, seven hundred eighty-six thousand, one hundred thirty-nine".