86686291 has 2 divisors, whose sum is σ = 86686292. Its totient is φ = 86686290.

The previous prime is 86686273. The next prime is 86686297. The reversal of 86686291 is 19268668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86686291 - 2⁹ = 86685779 is a prime.

It is not a weakly prime, because it can be changed into another prime (86686297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43343145 + 43343146.

It is an arithmetic number, because the mean of its divisors is an integer number (43343146).

Almost surely, 2^86686291 is an apocalyptic number.

86686291 is a deficient number, since it is larger than the sum of its proper divisors (1).

86686291 is an equidigital number, since it uses as much as digits as its factorization.

86686291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 86686291 is about 9310.5472986286. The cubic root of 86686291 is about 442.5715308836.

The spelling of 86686291 in words is "eighty-six million, six hundred eighty-six thousand, two hundred ninety-one".