86366981 has 2 divisors, whose sum is σ = 86366982. Its totient is φ = 86366980.

The previous prime is 86366977. The next prime is 86366983. The reversal of 86366981 is 18966368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66161956 + 20205025 = 8134^2 + 4495^2 .

It is a cyclic number.

It is not a de Polignac number, because 86366981 - 2² = 86366977 is a prime.

It is a super-2 number, since 2×86366981² = 14918510814108722, which contains 22 as substring.

Together with 86366983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86366983) 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, 43183490 + 43183491.

It is an arithmetic number, because the mean of its divisors is an integer number (43183491).

Almost surely, 2^86366981 is an apocalyptic number.

It is an amenable number.

86366981 is a deficient number, since it is larger than the sum of its proper divisors (1).

86366981 is an equidigital number, since it uses as much as digits as its factorization.

86366981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 86366981 is about 9293.3837217668. The cubic root of 86366981 is about 442.0274564409.

The spelling of 86366981 in words is "eighty-six million, three hundred sixty-six thousand, nine hundred eighty-one".