378226187 has 2 divisors, whose sum is σ = 378226188. Its totient is φ = 378226186.

The previous prime is 378226139. The next prime is 378226223. The reversal of 378226187 is 781622873.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 378226187 - 2¹⁴ = 378209803 is a prime.

It is not a weakly prime, because it can be changed into another prime (378226687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189113093 + 189113094.

It is an arithmetic number, because the mean of its divisors is an integer number (189113094).

Almost surely, 2^378226187 is an apocalyptic number.

378226187 is a deficient number, since it is larger than the sum of its proper divisors (1).

378226187 is an equidigital number, since it uses as much as digits as its factorization.

378226187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 378226187 is about 19448.0381272765. The cubic root of 378226187 is about 723.1868681813.

The spelling of 378226187 in words is "three hundred seventy-eight million, two hundred twenty-six thousand, one hundred eighty-seven".