378044893 has 2 divisors, whose sum is σ = 378044894. Its totient is φ = 378044892.

The previous prime is 378044869. The next prime is 378044903. The reversal of 378044893 is 398440873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246552804 + 131492089 = 15702^2 + 11467^2 .

It is an emirp because it is prime and its reverse (398440873) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378044893 is a prime.

It is a super-2 number, since 2×378044893² = 285835882246762898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378048893) 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, 189022446 + 189022447.

It is an arithmetic number, because the mean of its divisors is an integer number (189022447).

Almost surely, 2^378044893 is an apocalyptic number.

It is an amenable number.

378044893 is a deficient number, since it is larger than the sum of its proper divisors (1).

378044893 is an equidigital number, since it uses as much as digits as its factorization.

378044893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 378044893 is about 19443.3765843281. The cubic root of 378044893 is about 723.0713020657.

The spelling of 378044893 in words is "three hundred seventy-eight million, forty-four thousand, eight hundred ninety-three".