86978167 has 2 divisors, whose sum is σ = 86978168. Its totient is φ = 86978166.

The previous prime is 86978159. The next prime is 86978173. The reversal of 86978167 is 76187968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86978167 - 2³ = 86978159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86978147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43489083 + 43489084.

It is an arithmetic number, because the mean of its divisors is an integer number (43489084).

Almost surely, 2^86978167 is an apocalyptic number.

86978167 is a deficient number, since it is larger than the sum of its proper divisors (1).

86978167 is an equidigital number, since it uses as much as digits as its factorization.

86978167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The square root of 86978167 is about 9326.2086080036. The cubic root of 86978167 is about 443.0676927607.

The spelling of 86978167 in words is "eighty-six million, nine hundred seventy-eight thousand, one hundred sixty-seven".