86352181 has 2 divisors, whose sum is σ = 86352182. Its totient is φ = 86352180.

The previous prime is 86352179. The next prime is 86352229. The reversal of 86352181 is 18125368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83887281 + 2464900 = 9159^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 86352181 - 2¹ = 86352179 is a prime.

It is a super-4 number, since 4×86352181⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 86352179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86352781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43176090 + 43176091.

It is an arithmetic number, because the mean of its divisors is an integer number (43176091).

Almost surely, 2^86352181 is an apocalyptic number.

It is an amenable number.

86352181 is a deficient number, since it is larger than the sum of its proper divisors (1).

86352181 is an equidigital number, since it uses as much as digits as its factorization.

86352181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 86352181 is about 9292.5874222415. The cubic root of 86352181 is about 442.0022061273.

It can be divided in two parts, 8635 and 2181, that added together give a square (10816 = 104²).

The spelling of 86352181 in words is "eighty-six million, three hundred fifty-two thousand, one hundred eighty-one".