355891 has 2 divisors, whose sum is σ = 355892. Its totient is φ = 355890.

The previous prime is 355867. The next prime is 355909. The reversal of 355891 is 198553.

It is a strong prime.

It is an emirp because it is prime and its reverse (198553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355891 - 2⁷ = 355763 is a prime.

It is not a weakly prime, because it can be changed into another prime (355811) 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, 177945 + 177946.

It is an arithmetic number, because the mean of its divisors is an integer number (177946).

2³⁵⁵⁸⁹¹ is an apocalyptic number.

355891 is a deficient number, since it is larger than the sum of its proper divisors (1).

355891 is an equidigital number, since it uses as much as digits as its factorization.

355891 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 355891 is about 596.5660064067. The cubic root of 355891 is about 70.8661765417.

The spelling of 355891 in words is "three hundred fifty-five thousand, eight hundred ninety-one".