378888641 has 2 divisors, whose sum is σ = 378888642. Its totient is φ = 378888640.

The previous prime is 378888617. The next prime is 378888677. The reversal of 378888641 is 146888873.

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., 369408400 + 9480241 = 19220^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 378888641 - 2¹⁰ = 378887617 is a prime.

It is not a weakly prime, because it can be changed into another prime (378888611) 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, 189444320 + 189444321.

It is an arithmetic number, because the mean of its divisors is an integer number (189444321).

Almost surely, 2^378888641 is an apocalyptic number.

It is an amenable number.

378888641 is a deficient number, since it is larger than the sum of its proper divisors (1).

378888641 is an equidigital number, since it uses as much as digits as its factorization.

378888641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2064384, while the sum is 53.

The square root of 378888641 is about 19465.0620600090. The cubic root of 378888641 is about 723.6088366788.

It can be divided in two parts, 3788 and 88641, that added together give a palindrome (92429).

The spelling of 378888641 in words is "three hundred seventy-eight million, eight hundred eighty-eight thousand, six hundred forty-one".