388891 has 2 divisors, whose sum is σ = 388892. Its totient is φ = 388890.

The previous prime is 388879. The next prime is 388897. The reversal of 388891 is 198883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388891 - 2⁵ = 388859 is a prime.

It is a Chen prime.

388891 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 388891.

It is not a weakly prime, because it can be changed into another prime (388897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194445 + 194446.

It is an arithmetic number, because the mean of its divisors is an integer number (194446).

2³⁸⁸⁸⁹¹ is an apocalyptic number.

388891 is a deficient number, since it is larger than the sum of its proper divisors (1).

388891 is an equidigital number, since it uses as much as digits as its factorization.

388891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 388891 is about 623.6112571146. The cubic root of 388891 is about 72.9921177453.

The spelling of 388891 in words is "three hundred eighty-eight thousand, eight hundred ninety-one".