86664131 has 2 divisors, whose sum is σ = 86664132. Its totient is φ = 86664130.

The previous prime is 86664121. The next prime is 86664133. The reversal of 86664131 is 13146668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86664131 is a prime.

It is a super-2 number, since 2×86664131² = 15021343203970322, which contains 22 as substring.

Together with 86664133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86664091 and 86664100.

It is not a weakly prime, because it can be changed into another prime (86664133) 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, 43332065 + 43332066.

It is an arithmetic number, because the mean of its divisors is an integer number (43332066).

Almost surely, 2^86664131 is an apocalyptic number.

86664131 is a deficient number, since it is larger than the sum of its proper divisors (1).

86664131 is an equidigital number, since it uses as much as digits as its factorization.

86664131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 86664131 is about 9309.3571743703. The cubic root of 86664131 is about 442.5338154970.

The spelling of 86664131 in words is "eighty-six million, six hundred sixty-four thousand, one hundred thirty-one".