86403181 has 2 divisors, whose sum is σ = 86403182. Its totient is φ = 86403180.

The previous prime is 86403139. The next prime is 86403193. The reversal of 86403181 is 18130468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 933156 = 9245^2 + 966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86403181 is a prime.

It is a super-2 number, since 2×86403181² = 14931019373837522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86403131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43201590 + 43201591.

It is an arithmetic number, because the mean of its divisors is an integer number (43201591).

Almost surely, 2^86403181 is an apocalyptic number.

It is an amenable number.

86403181 is a deficient number, since it is larger than the sum of its proper divisors (1).

86403181 is an equidigital number, since it uses as much as digits as its factorization.

86403181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 86403181 is about 9295.3311398788. The cubic root of 86403181 is about 442.0892051889.

The spelling of 86403181 in words is "eighty-six million, four hundred three thousand, one hundred eighty-one".