86467781 has 2 divisors, whose sum is σ = 86467782. Its totient is φ = 86467780.

The previous prime is 86467753. The next prime is 86467807. The reversal of 86467781 is 18776468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 70756 = 9295^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 86467781 - 2²⁶ = 19358917 is a prime.

It is a super-2 number, since 2×86467781² = 14953354302127922, 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 (86467181) 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, 43233890 + 43233891.

It is an arithmetic number, because the mean of its divisors is an integer number (43233891).

Almost surely, 2^86467781 is an apocalyptic number.

It is an amenable number.

86467781 is a deficient number, since it is larger than the sum of its proper divisors (1).

86467781 is an equidigital number, since it uses as much as digits as its factorization.

86467781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 86467781 is about 9298.8053533774. The cubic root of 86467781 is about 442.1993548687.

The spelling of 86467781 in words is "eighty-six million, four hundred sixty-seven thousand, seven hundred eighty-one".