378662321 has 4 divisors (see below), whose sum is σ = 378846192. Its totient is φ = 378478452.

The previous prime is 378662281. The next prime is 378662327. The reversal of 378662321 is 123266873.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123266873 = 433 ⋅284681.

It is a cyclic number.

It is not a de Polignac number, because 378662321 - 2²⁶ = 311553457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378662327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88811 + ... + 92976.

It is an arithmetic number, because the mean of its divisors is an integer number (94711548).

Almost surely, 2^378662321 is an apocalyptic number.

It is an amenable number.

378662321 is a deficient number, since it is larger than the sum of its proper divisors (183871).

378662321 is a wasteful number, since it uses less digits than its factorization.

378662321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183870.

The product of its digits is 72576, while the sum is 38.

The square root of 378662321 is about 19459.2476987164. The cubic root of 378662321 is about 723.4647312149.

The spelling of 378662321 in words is "three hundred seventy-eight million, six hundred sixty-two thousand, three hundred twenty-one".