378888689 has 2 divisors, whose sum is σ = 378888690. Its totient is φ = 378888688.

The previous prime is 378888677. The next prime is 378888701. The reversal of 378888689 is 986888873.

It is a balanced prime because it is at equal distance from previous prime (378888677) and next prime (378888701).

It can be written as a sum of positive squares in only one way, i.e., 281669089 + 97219600 = 16783^2 + 9860^2 .

It is an emirp because it is prime and its reverse (986888873) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378888689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (378588689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189444344 + 189444345.

It is an arithmetic number, because the mean of its divisors is an integer number (189444345).

Almost surely, 2^378888689 is an apocalyptic number.

It is an amenable number.

378888689 is a deficient number, since it is larger than the sum of its proper divisors (1).

378888689 is an equidigital number, since it uses as much as digits as its factorization.

378888689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 65.

The square root of 378888689 is about 19465.0632929873. The cubic root of 378888689 is about 723.6088672359.

The spelling of 378888689 in words is "three hundred seventy-eight million, eight hundred eighty-eight thousand, six hundred eighty-nine".