385591 has 2 divisors, whose sum is σ = 385592. Its totient is φ = 385590.

The previous prime is 385589. The next prime is 385597. The reversal of 385591 is 195583.

385591 = 251² + 252² + ... + 256².

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385591 - 2¹ = 385589 is a prime.

Together with 385589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385597) 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, 192795 + 192796.

It is an arithmetic number, because the mean of its divisors is an integer number (192796).

2³⁸⁵⁵⁹¹ is an apocalyptic number.

385591 is a deficient number, since it is larger than the sum of its proper divisors (1).

385591 is an equidigital number, since it uses as much as digits as its factorization.

385591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 385591 is about 620.9597410461. The cubic root of 385591 is about 72.7850686884.

The spelling of 385591 in words is "three hundred eighty-five thousand, five hundred ninety-one".