64091 has 2 divisors, whose sum is σ = 64092. Its totient is φ = 64090.
The previous prime is 64081. The next prime is 64109. The reversal of 64091 is 19046.
Together with next prime (64109) it forms an Ormiston pair, because they use the same digits, order apart.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 64091 - 210 = 63067 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (64081) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32045 + 32046.
It is an arithmetic number, because the mean of its divisors is an integer number (32046).
264091 is an apocalyptic number.
64091 is a deficient number, since it is larger than the sum of its proper divisors (1).
64091 is an equidigital number, since it uses as much as digits as its factorization.
64091 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 216, while the sum is 20.
The square root of 64091 is about 253.1620034681. The cubic root of 64091 is about 40.0189493550.
The spelling of 64091 in words is "sixty-four thousand, ninety-one".
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