86570129 has 2 divisors, whose sum is σ = 86570130. Its totient is φ = 86570128.

The previous prime is 86570111. The next prime is 86570131. The reversal of 86570129 is 92107568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78730129 + 7840000 = 8873^2 + 2800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86570129 is a prime.

Together with 86570131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86570092 and 86570101.

It is not a weakly prime, because it can be changed into another prime (86570179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43285064 + 43285065.

It is an arithmetic number, because the mean of its divisors is an integer number (43285065).

Almost surely, 2^86570129 is an apocalyptic number.

It is an amenable number.

86570129 is a deficient number, since it is larger than the sum of its proper divisors (1).

86570129 is an equidigital number, since it uses as much as digits as its factorization.

86570129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 86570129 is about 9304.3070134213. The cubic root of 86570129 is about 442.3737565324.

The spelling of 86570129 in words is "eighty-six million, five hundred seventy thousand, one hundred twenty-nine".