378231667 has 4 divisors (see below), whose sum is σ = 412616376. Its totient is φ = 343846960.

The previous prime is 378231661. The next prime is 378231673. The reversal of 378231667 is 766132873.

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

It is an interprime number because it is at equal distance from previous prime (378231661) and next prime (378231673).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378231667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378231661) 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, 17192338 + ... + 17192359.

It is an arithmetic number, because the mean of its divisors is an integer number (103154094).

Almost surely, 2^378231667 is an apocalyptic number.

378231667 is a deficient number, since it is larger than the sum of its proper divisors (34384709).

378231667 is a wasteful number, since it uses less digits than its factorization.

378231667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34384708.

The product of its digits is 254016, while the sum is 43.

The square root of 378231667 is about 19448.1790150132. The cubic root of 378231667 is about 723.1903608399.

The spelling of 378231667 in words is "three hundred seventy-eight million, two hundred thirty-one thousand, six hundred sixty-seven".