378685441 has 2 divisors, whose sum is σ = 378685442. Its totient is φ = 378685440.

The previous prime is 378685427. The next prime is 378685459. The reversal of 378685441 is 144586873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376204816 + 2480625 = 19396^2 + 1575^2 .

It is a cyclic number.

It is not a de Polignac number, because 378685441 - 2⁷ = 378685313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378685391 and 378685400.

It is not a weakly prime, because it can be changed into another prime (378685481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189342720 + 189342721.

It is an arithmetic number, because the mean of its divisors is an integer number (189342721).

Almost surely, 2^378685441 is an apocalyptic number.

It is an amenable number.

378685441 is a deficient number, since it is larger than the sum of its proper divisors (1).

378685441 is an equidigital number, since it uses as much as digits as its factorization.

378685441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 378685441 is about 19459.8417516690. The cubic root of 378685441 is about 723.4794551199.

The spelling of 378685441 in words is "three hundred seventy-eight million, six hundred eighty-five thousand, four hundred forty-one".