86589689 has 2 divisors, whose sum is σ = 86589690. Its totient is φ = 86589688.

The previous prime is 86589647. The next prime is 86589691. The reversal of 86589689 is 98698568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71690089 + 14899600 = 8467^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 86589689 - 2¹⁶ = 86524153 is a prime.

It is a super-2 number, since 2×86589689² = 14995548482233442, which contains 22 as substring.

Together with 86589691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86589589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43294844 + 43294845.

It is an arithmetic number, because the mean of its divisors is an integer number (43294845).

Almost surely, 2^86589689 is an apocalyptic number.

It is an amenable number.

86589689 is a deficient number, since it is larger than the sum of its proper divisors (1).

86589689 is an equidigital number, since it uses as much as digits as its factorization.

86589689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 59.

The square root of 86589689 is about 9305.3580801601. The cubic root of 86589689 is about 442.4070712534.

It can be divided in two parts, 86589 and 689, that added together give a palindrome (87278).

The spelling of 86589689 in words is "eighty-six million, five hundred eighty-nine thousand, six hundred eighty-nine".