384709081 has 8 divisors (see below), whose sum is σ = 389665640. Its totient is φ = 379772928.

The previous prime is 384709079. The next prime is 384709103. The reversal of 384709081 is 180907483.

It can be written as a sum of positive squares in 4 ways, for example, as 58003456 + 326705625 = 7616^2 + 18075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 384709081 - 2¹ = 384709079 is a prime.

It is a super-2 number, since 2×384709081² = 296002154007729122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384709681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34825 + ... + 44521.

It is an arithmetic number, because the mean of its divisors is an integer number (48708205).

Almost surely, 2^384709081 is an apocalyptic number.

It is an amenable number.

384709081 is a deficient number, since it is larger than the sum of its proper divisors (4956559).

384709081 is an equidigital number, since it uses as much as digits as its factorization.

384709081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 384709081 is about 19614.0021668195. The cubic root of 384709081 is about 727.2953528998.

The spelling of 384709081 in words is "three hundred eighty-four million, seven hundred nine thousand, eighty-one".