378383221 has 4 divisors (see below), whose sum is σ = 378719500. Its totient is φ = 378046944.

The previous prime is 378383209. The next prime is 378383231. The reversal of 378383221 is 122383873.

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 16851025 + 361532196 = 4105^2 + 19014^2 .

It is a cyclic number.

It is not a de Polignac number, because 378383221 - 2¹¹ = 378381173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378383231) 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, 166446 + ... + 168703.

It is an arithmetic number, because the mean of its divisors is an integer number (94679875).

Almost surely, 2^378383221 is an apocalyptic number.

It is an amenable number.

378383221 is a deficient number, since it is larger than the sum of its proper divisors (336279).

378383221 is a wasteful number, since it uses less digits than its factorization.

378383221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336278.

The product of its digits is 48384, while the sum is 37.

The square root of 378383221 is about 19452.0749792921. The cubic root of 378383221 is about 723.2869398821.

The spelling of 378383221 in words is "three hundred seventy-eight million, three hundred eighty-three thousand, two hundred twenty-one".