383947 has 4 divisors (see below), whose sum is σ = 392920. Its totient is φ = 374976.

The previous prime is 383941. The next prime is 383951. The reversal of 383947 is 749383.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 383947 - 2¹⁵ = 351179 is a prime.

It is a Duffinian number.

383947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (383941) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4422 + ... + 4507.

It is an arithmetic number, because the mean of its divisors is an integer number (98230).

2³⁸³⁹⁴⁷ is an apocalyptic number.

383947 is a deficient number, since it is larger than the sum of its proper divisors (8973).

383947 is an equidigital number, since it uses as much as digits as its factorization.

383947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972.

The product of its digits is 18144, while the sum is 34.

The square root of 383947 is about 619.6345697264. The cubic root of 383947 is about 72.6814795528.

The spelling of 383947 in words is "three hundred eighty-three thousand, nine hundred forty-seven".