378466381 has 2 divisors, whose sum is σ = 378466382. Its totient is φ = 378466380.

The previous prime is 378466373. The next prime is 378466397. The reversal of 378466381 is 183664873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273075625 + 105390756 = 16525^2 + 10266^2 .

It is a cyclic number.

It is not a de Polignac number, because 378466381 - 2³ = 378466373 is a prime.

It is a super-2 number, since 2×378466381² = 286473603094474322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378466351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189233190 + 189233191.

It is an arithmetic number, because the mean of its divisors is an integer number (189233191).

Almost surely, 2^378466381 is an apocalyptic number.

It is an amenable number.

378466381 is a deficient number, since it is larger than the sum of its proper divisors (1).

378466381 is an equidigital number, since it uses as much as digits as its factorization.

378466381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 378466381 is about 19454.2124230204. The cubic root of 378466381 is about 723.3399233238.

The spelling of 378466381 in words is "three hundred seventy-eight million, four hundred sixty-six thousand, three hundred eighty-one".