64591 has 2 divisors, whose sum is σ = 64592. Its totient is φ = 64590.

The previous prime is 64579. The next prime is 64601. The reversal of 64591 is 19546.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64591 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64091) 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, 32295 + 32296.

It is an arithmetic number, because the mean of its divisors is an integer number (32296).

2⁶⁴⁵⁹¹ is an apocalyptic number.

64591 is a deficient number, since it is larger than the sum of its proper divisors (1).

64591 is an equidigital number, since it uses as much as digits as its factorization.

64591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 64591 is about 254.1475949129. The cubic root of 64591 is about 40.1227479383.

The spelling of 64591 in words is "sixty-four thousand, five hundred ninety-one".