86508729 has 48 divisors (see below), whose sum is σ = 140038080. Its totient is φ = 53187840.

The previous prime is 86508707. The next prime is 86508739. The reversal of 86508729 is 92780568.

It is not a de Polignac number, because 86508729 - 2¹³ = 86500537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86508739) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189069 + ... + 189525.

It is an arithmetic number, because the mean of its divisors is an integer number (2917460).

Almost surely, 2^86508729 is an apocalyptic number.

It is an amenable number.

86508729 is a deficient number, since it is larger than the sum of its proper divisors (53529351).

86508729 is a wasteful number, since it uses less digits than its factorization.

86508729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 86508729 is about 9301.0068809780. The cubic root of 86508729 is about 442.2691470365.

The spelling of 86508729 in words is "eighty-six million, five hundred eight thousand, seven hundred twenty-nine".