383891 has 2 divisors, whose sum is σ = 383892. Its totient is φ = 383890.

The previous prime is 383869. The next prime is 383909. The reversal of 383891 is 198383.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 383891 - 2¹⁰ = 382867 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (383821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191945 + 191946.

It is an arithmetic number, because the mean of its divisors is an integer number (191946).

2³⁸³⁸⁹¹ is an apocalyptic number.

383891 is a deficient number, since it is larger than the sum of its proper divisors (1).

383891 is an equidigital number, since it uses as much as digits as its factorization.

383891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 383891 is about 619.5893801543. The cubic root of 383891 is about 72.6779457658.

The spelling of 383891 in words is "three hundred eighty-three thousand, eight hundred ninety-one".