86491 has 2 divisors, whose sum is σ = 86492. Its totient is φ = 86490.

The previous prime is 86477. The next prime is 86501. The reversal of 86491 is 19468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86491 - 2¹¹ = 84443 is a prime.

86491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (86441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43245 + 43246.

It is an arithmetic number, because the mean of its divisors is an integer number (43246).

2⁸⁶⁴⁹¹ is an apocalyptic number.

86491 is a deficient number, since it is larger than the sum of its proper divisors (1).

86491 is an equidigital number, since it uses as much as digits as its factorization.

86491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 86491 is about 294.0935225400. The cubic root of 86491 is about 44.2238932261.

The spelling of 86491 in words is "eighty-six thousand, four hundred ninety-one".