86705239 has 16 divisors (see below), whose sum is σ = 92728512. Its totient is φ = 80898048.

The previous prime is 86705207. The next prime is 86705251. The reversal of 86705239 is 93250768.

It is a cyclic number.

It is not a de Polignac number, because 86705239 - 2⁵ = 86705207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86705539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189499 + ... + 189955.

It is an arithmetic number, because the mean of its divisors is an integer number (5795532).

Almost surely, 2^86705239 is an apocalyptic number.

86705239 is a deficient number, since it is larger than the sum of its proper divisors (6023273).

86705239 is a wasteful number, since it uses less digits than its factorization.

86705239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 86705239 is about 9311.5647986791. The cubic root of 86705239 is about 442.6037744843.

The spelling of 86705239 in words is "eighty-six million, seven hundred five thousand, two hundred thirty-nine".