84691 has 2 divisors, whose sum is σ = 84692. Its totient is φ = 84690.

The previous prime is 84673. The next prime is 84697. The reversal of 84691 is 19648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84691 - 2⁵ = 84659 is a prime.

It is not a weakly prime, because it can be changed into another prime (84697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42345 + 42346.

It is an arithmetic number, because the mean of its divisors is an integer number (42346).

2⁸⁴⁶⁹¹ is an apocalyptic number.

84691 is a deficient number, since it is larger than the sum of its proper divisors (1).

84691 is an equidigital number, since it uses as much as digits as its factorization.

84691 is an odious number, because the sum of its binary digits is odd.

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

The square root of 84691 is about 291.0171816234. The cubic root of 84691 is about 43.9149527988.

The spelling of 84691 in words is "eighty-four thousand, six hundred ninety-one".