278282863 has 2 divisors, whose sum is σ = 278282864. Its totient is φ = 278282862.

The previous prime is 278282857. The next prime is 278282897. The reversal of 278282863 is 368282872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278282863 - 2⁵ = 278282831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278282813) 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, 139141431 + 139141432.

It is an arithmetic number, because the mean of its divisors is an integer number (139141432).

Almost surely, 2^278282863 is an apocalyptic number.

278282863 is a deficient number, since it is larger than the sum of its proper divisors (1).

278282863 is an equidigital number, since it uses as much as digits as its factorization.

278282863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 46.

The square root of 278282863 is about 16681.8123415893. The cubic root of 278282863 is about 652.8731691009.

Subtracting 278282863 from its reverse (368282872), we obtain a palindrome (90000009).

The spelling of 278282863 in words is "two hundred seventy-eight million, two hundred eighty-two thousand, eight hundred sixty-three".