378813361 has 2 divisors, whose sum is σ = 378813362. Its totient is φ = 378813360.

The previous prime is 378813311. The next prime is 378813371. The reversal of 378813361 is 163318873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211266225 + 167547136 = 14535^2 + 12944^2 .

It is an emirp because it is prime and its reverse (163318873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378813361 - 2²⁷ = 244595633 is a prime.

It is not a weakly prime, because it can be changed into another prime (378813311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189406680 + 189406681.

It is an arithmetic number, because the mean of its divisors is an integer number (189406681).

Almost surely, 2^378813361 is an apocalyptic number.

It is an amenable number.

378813361 is a deficient number, since it is larger than the sum of its proper divisors (1).

378813361 is an equidigital number, since it uses as much as digits as its factorization.

378813361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 378813361 is about 19463.1282429110. The cubic root of 378813361 is about 723.5609097724.

The spelling of 378813361 in words is "three hundred seventy-eight million, eight hundred thirteen thousand, three hundred sixty-one".