378013381 has 2 divisors, whose sum is σ = 378013382. Its totient is φ = 378013380.

The previous prime is 378013367. The next prime is 378013403. The reversal of 378013381 is 183310873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369216225 + 8797156 = 19215^2 + 2966^2 .

It is an emirp because it is prime and its reverse (183310873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378013381 - 2¹³ = 378005189 is a prime.

It is a super-2 number, since 2×378013381² = 285788232430102322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378013981) 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, 189006690 + 189006691.

It is an arithmetic number, because the mean of its divisors is an integer number (189006691).

Almost surely, 2^378013381 is an apocalyptic number.

It is an amenable number.

378013381 is a deficient number, since it is larger than the sum of its proper divisors (1).

378013381 is an equidigital number, since it uses as much as digits as its factorization.

378013381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 378013381 is about 19442.5662143658. The cubic root of 378013381 is about 723.0512109280.

It can be divided in two parts, 3780 and 13381, that added together give a square (17161 = 131²).

The spelling of 378013381 in words is "three hundred seventy-eight million, thirteen thousand, three hundred eighty-one".