384334781 has 4 divisors (see below), whose sum is σ = 385037952. Its totient is φ = 383631612.

The previous prime is 384334739. The next prime is 384334789. The reversal of 384334781 is 187433483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 384334781 - 2¹⁴ = 384318397 is a prime.

It is a super-2 number, since 2×384334781² = 295426447772635922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384334789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350765 + ... + 351858.

It is an arithmetic number, because the mean of its divisors is an integer number (96259488).

Almost surely, 2^384334781 is an apocalyptic number.

It is an amenable number.

384334781 is a deficient number, since it is larger than the sum of its proper divisors (703171).

384334781 is an equidigital number, since it uses as much as digits as its factorization.

384334781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703170.

The product of its digits is 193536, while the sum is 41.

The square root of 384334781 is about 19604.4581919522. The cubic root of 384334781 is about 727.0594040588.

The spelling of 384334781 in words is "three hundred eighty-four million, three hundred thirty-four thousand, seven hundred eighty-one".