278461049 has 2 divisors, whose sum is σ = 278461050. Its totient is φ = 278461048.

The previous prime is 278461021. The next prime is 278461081. The reversal of 278461049 is 940164872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278389225 + 71824 = 16685^2 + 268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278461049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 278460997 and 278461015.

It is not a weakly prime, because it can be changed into another prime (278461019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139230524 + 139230525.

It is an arithmetic number, because the mean of its divisors is an integer number (139230525).

Almost surely, 2^278461049 is an apocalyptic number.

It is an amenable number.

278461049 is a deficient number, since it is larger than the sum of its proper divisors (1).

278461049 is an equidigital number, since it uses as much as digits as its factorization.

278461049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 278461049 is about 16687.1522136043. The cubic root of 278461049 is about 653.0124854264.

The spelling of 278461049 in words is "two hundred seventy-eight million, four hundred sixty-one thousand, forty-nine".