86231709 has 36 divisors (see below), whose sum is σ = 136465056. Its totient is φ = 54406728.

The previous prime is 86231707. The next prime is 86231711. The reversal of 86231709 is 90713268.

It is an interprime number because it is at equal distance from previous prime (86231707) and next prime (86231711).

It is not a de Polignac number, because 86231709 - 2¹ = 86231707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86231707) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87232 + ... + 88214.

It is an arithmetic number, because the mean of its divisors is an integer number (3790696).

Almost surely, 2^86231709 is an apocalyptic number.

It is an amenable number.

86231709 is a deficient number, since it is larger than the sum of its proper divisors (50233347).

86231709 is an equidigital number, since it uses as much as digits as its factorization.

86231709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 86231709 is about 9286.1030039517. The cubic root of 86231709 is about 441.7965611692.

The spelling of 86231709 in words is "eighty-six million, two hundred thirty-one thousand, seven hundred nine".