86530639 has 16 divisors (see below), whose sum is σ = 95790240. Its totient is φ = 77673600.

The previous prime is 86530637. The next prime is 86530643. The reversal of 86530639 is 93603568.

86530639 = T₂₀₈₇ + T₂₀₈₈ + ... + T₂₁₂₅.

It is a cyclic number.

It is not a de Polignac number, because 86530639 - 2¹ = 86530637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86530637) 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, 76909 + ... + 78025.

It is an arithmetic number, because the mean of its divisors is an integer number (5986890).

Almost surely, 2^86530639 is an apocalyptic number.

86530639 is a deficient number, since it is larger than the sum of its proper divisors (9259601).

86530639 is a wasteful number, since it uses less digits than its factorization.

86530639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 86530639 is about 9302.1846358799. The cubic root of 86530639 is about 442.3064816082.

The spelling of 86530639 in words is "eighty-six million, five hundred thirty thousand, six hundred thirty-nine".