86851 has 2 divisors, whose sum is σ = 86852. Its totient is φ = 86850.

The previous prime is 86843. The next prime is 86857. The reversal of 86851 is 15868.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86851 - 2³ = 86843 is a prime.

It is not a weakly prime, because it can be changed into another prime (86857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43425 + 43426.

It is an arithmetic number, because the mean of its divisors is an integer number (43426).

2⁸⁶⁸⁵¹ is an apocalyptic number.

86851 is a deficient number, since it is larger than the sum of its proper divisors (1).

86851 is an equidigital number, since it uses as much as digits as its factorization.

86851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 86851 is about 294.7049371829. The cubic root of 86851 is about 44.2851657432.

It can be divided in two parts, 868 and 51, that added together give a palindrome (919).

The spelling of 86851 in words is "eighty-six thousand, eight hundred fifty-one".