378354169 has 2 divisors, whose sum is σ = 378354170. Its totient is φ = 378354168.

The previous prime is 378354131. The next prime is 378354173. The reversal of 378354169 is 961453873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275128569 + 103225600 = 16587^2 + 10160^2 .

It is a cyclic number.

It is not a de Polignac number, because 378354169 - 2²⁵ = 344799737 is a prime.

It is a super-2 number, since 2×378354169² = 286303754399361122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (378354469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189177084 + 189177085.

It is an arithmetic number, because the mean of its divisors is an integer number (189177085).

Almost surely, 2^378354169 is an apocalyptic number.

It is an amenable number.

378354169 is a deficient number, since it is larger than the sum of its proper divisors (1).

378354169 is an equidigital number, since it uses as much as digits as its factorization.

378354169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 378354169 is about 19451.3282065776. The cubic root of 378354169 is about 723.2684282526.

The spelling of 378354169 in words is "three hundred seventy-eight million, three hundred fifty-four thousand, one hundred sixty-nine".