378720361 has 2 divisors, whose sum is σ = 378720362. Its totient is φ = 378720360.

The previous prime is 378720359. The next prime is 378720383. The reversal of 378720361 is 163027873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313821225 + 64899136 = 17715^2 + 8056^2 .

It is a cyclic number.

It is not a de Polignac number, because 378720361 - 2¹ = 378720359 is a prime.

It is a super-2 number, since 2×378720361² = 286858223671940642, which contains 22 as substring.

Together with 378720359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 378720361.

It is not a weakly prime, because it can be changed into another prime (378720761) 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, 189360180 + 189360181.

It is an arithmetic number, because the mean of its divisors is an integer number (189360181).

Almost surely, 2^378720361 is an apocalyptic number.

It is an amenable number.

378720361 is a deficient number, since it is larger than the sum of its proper divisors (1).

378720361 is an equidigital number, since it uses as much as digits as its factorization.

378720361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 378720361 is about 19460.7389633590. The cubic root of 378720361 is about 723.5016926847.

The spelling of 378720361 in words is "three hundred seventy-eight million, seven hundred twenty thousand, three hundred sixty-one".