378744481 has 2 divisors, whose sum is σ = 378744482. Its totient is φ = 378744480.

The previous prime is 378744467. The next prime is 378744503. The reversal of 378744481 is 184447873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193349025 + 185395456 = 13905^2 + 13616^2 .

It is an emirp because it is prime and its reverse (184447873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378744481 - 2¹³ = 378736289 is a prime.

It is a super-2 number, since 2×378744481² = 286894763775918722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (370744481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189372240 + 189372241.

It is an arithmetic number, because the mean of its divisors is an integer number (189372241).

Almost surely, 2^378744481 is an apocalyptic number.

It is an amenable number.

378744481 is a deficient number, since it is larger than the sum of its proper divisors (1).

378744481 is an equidigital number, since it uses as much as digits as its factorization.

378744481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 46.

The square root of 378744481 is about 19461.3586627450. The cubic root of 378744481 is about 723.5170518539.

The spelling of 378744481 in words is "three hundred seventy-eight million, seven hundred forty-four thousand, four hundred eighty-one".