378678353 has 2 divisors, whose sum is σ = 378678354. Its totient is φ = 378678352.

The previous prime is 378678347. The next prime is 378678401. The reversal of 378678353 is 353876873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376670464 + 2007889 = 19408^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 378678353 - 2²² = 374484049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (378678323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189339176 + 189339177.

It is an arithmetic number, because the mean of its divisors is an integer number (189339177).

Almost surely, 2^378678353 is an apocalyptic number.

It is an amenable number.

378678353 is a deficient number, since it is larger than the sum of its proper divisors (1).

378678353 is an equidigital number, since it uses as much as digits as its factorization.

378678353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 50.

The square root of 378678353 is about 19459.6596321724. The cubic root of 378678353 is about 723.4749412113.

The spelling of 378678353 in words is "three hundred seventy-eight million, six hundred seventy-eight thousand, three hundred fifty-three".