378706189 has 2 divisors, whose sum is σ = 378706190. Its totient is φ = 378706188.

The previous prime is 378706121. The next prime is 378706193. The reversal of 378706189 is 981607873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254562025 + 124144164 = 15955^2 + 11142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378706189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378701189) 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, 189353094 + 189353095.

It is an arithmetic number, because the mean of its divisors is an integer number (189353095).

Almost surely, 2^378706189 is an apocalyptic number.

It is an amenable number.

378706189 is a deficient number, since it is larger than the sum of its proper divisors (1).

378706189 is an equidigital number, since it uses as much as digits as its factorization.

378706189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 378706189 is about 19460.3748422275. The cubic root of 378706189 is about 723.4926679134.

The spelling of 378706189 in words is "three hundred seventy-eight million, seven hundred six thousand, one hundred eighty-nine".