378323129 has 2 divisors, whose sum is σ = 378323130. Its totient is φ = 378323128.

The previous prime is 378323119. The next prime is 378323137. The reversal of 378323129 is 921323873.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294637225 + 83685904 = 17165^2 + 9148^2 .

It is an emirp because it is prime and its reverse (921323873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378323129 - 2⁸ = 378322873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 378323092 and 378323101.

It is not a weakly prime, because it can be changed into another prime (378323119) 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, 189161564 + 189161565.

It is an arithmetic number, because the mean of its divisors is an integer number (189161565).

Almost surely, 2^378323129 is an apocalyptic number.

It is an amenable number.

378323129 is a deficient number, since it is larger than the sum of its proper divisors (1).

378323129 is an equidigital number, since it uses as much as digits as its factorization.

378323129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 378323129 is about 19450.5303012540. The cubic root of 378323129 is about 723.2486488432.

The spelling of 378323129 in words is "three hundred seventy-eight million, three hundred twenty-three thousand, one hundred twenty-nine".