86710639 has 2 divisors, whose sum is σ = 86710640. Its totient is φ = 86710638.

The previous prime is 86710633. The next prime is 86710649. The reversal of 86710639 is 93601768.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86710639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86710633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43355319 + 43355320.

It is an arithmetic number, because the mean of its divisors is an integer number (43355320).

Almost surely, 2^86710639 is an apocalyptic number.

86710639 is a deficient number, since it is larger than the sum of its proper divisors (1).

86710639 is an equidigital number, since it uses as much as digits as its factorization.

86710639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 86710639 is about 9311.8547561697. The cubic root of 86710639 is about 442.6129627440.

The spelling of 86710639 in words is "eighty-six million, seven hundred ten thousand, six hundred thirty-nine".