378304187 has 2 divisors, whose sum is σ = 378304188. Its totient is φ = 378304186.

The previous prime is 378304151. The next prime is 378304189. The reversal of 378304187 is 781403873.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 378304187 - 2²⁰ = 377255611 is a prime.

It is a super-2 number, since 2×378304187² = 286228115803461938, which contains 22 as substring.

Together with 378304189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (378304189) 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 as a sum of consecutive naturals, namely, 189152093 + 189152094.

It is an arithmetic number, because the mean of its divisors is an integer number (189152094).

Almost surely, 2^378304187 is an apocalyptic number.

378304187 is a deficient number, since it is larger than the sum of its proper divisors (1).

378304187 is an equidigital number, since it uses as much as digits as its factorization.

378304187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 378304187 is about 19450.0433675609. The cubic root of 378304187 is about 723.2365780291.

The spelling of 378304187 in words is "three hundred seventy-eight million, three hundred four thousand, one hundred eighty-seven".