278363 has 2 divisors, whose sum is σ = 278364. Its totient is φ = 278362.

The previous prime is 278353. The next prime is 278387. The reversal of 278363 is 363872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278363 - 2⁴ = 278347 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (278353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139181 + 139182.

It is an arithmetic number, because the mean of its divisors is an integer number (139182).

2²⁷⁸³⁶³ is an apocalyptic number.

278363 is a deficient number, since it is larger than the sum of its proper divisors (1).

278363 is an equidigital number, since it uses as much as digits as its factorization.

278363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 278363 is about 527.6011751314. The cubic root of 278363 is about 65.2935832291.

The spelling of 278363 in words is "two hundred seventy-eight thousand, three hundred sixty-three".