385391 has 2 divisors, whose sum is σ = 385392. Its totient is φ = 385390.

The previous prime is 385379. The next prime is 385393. The reversal of 385391 is 193583.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 385391 - 2⁶ = 385327 is a prime.

Together with 385393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192695 + 192696.

It is an arithmetic number, because the mean of its divisors is an integer number (192696).

2³⁸⁵³⁹¹ is an apocalyptic number.

385391 is a deficient number, since it is larger than the sum of its proper divisors (1).

385391 is an equidigital number, since it uses as much as digits as its factorization.

385391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 385391 is about 620.7986791223. The cubic root of 385391 is about 72.7724823544.

The spelling of 385391 in words is "three hundred eighty-five thousand, three hundred ninety-one".