382180921 has 4 divisors (see below), whose sum is σ = 388446244. Its totient is φ = 375915600.

The previous prime is 382180913. The next prime is 382180951. The reversal of 382180921 is 129081283.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17943696 + 364237225 = 4236^2 + 19085^2 .

It is a cyclic number.

It is not a de Polignac number, because 382180921 - 2³ = 382180913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (382180951) 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 3 ways as a sum of consecutive naturals, for example, 3132570 + ... + 3132691.

It is an arithmetic number, because the mean of its divisors is an integer number (97111561).

Almost surely, 2^382180921 is an apocalyptic number.

It is an amenable number.

382180921 is a deficient number, since it is larger than the sum of its proper divisors (6265323).

382180921 is an equidigital number, since it uses as much as digits as its factorization.

382180921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265322.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 382180921 is about 19549.4480996268. The cubic root of 382180921 is about 725.6986818353.

The spelling of 382180921 in words is "three hundred eighty-two million, one hundred eighty thousand, nine hundred twenty-one".