378863813 has 2 divisors, whose sum is σ = 378863814. Its totient is φ = 378863812.

The previous prime is 378863791. The next prime is 378863867. The reversal of 378863813 is 318368873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373185124 + 5678689 = 19318^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 378863813 - 2¹⁰ = 378862789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378863213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189431906 + 189431907.

It is an arithmetic number, because the mean of its divisors is an integer number (189431907).

Almost surely, 2^378863813 is an apocalyptic number.

It is an amenable number.

378863813 is a deficient number, since it is larger than the sum of its proper divisors (1).

378863813 is an equidigital number, since it uses as much as digits as its factorization.

378863813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 378863813 is about 19464.4242915119. The cubic root of 378863813 is about 723.5930306691.

The spelling of 378863813 in words is "three hundred seventy-eight million, eight hundred sixty-three thousand, eight hundred thirteen".