278452459 has 2 divisors, whose sum is σ = 278452460. Its totient is φ = 278452458.

The previous prime is 278452451. The next prime is 278452549. The reversal of 278452459 is 954254872.

Together with next prime (278452549) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278452459 - 2³ = 278452451 is a prime.

It is not a weakly prime, because it can be changed into another prime (278452451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139226229 + 139226230.

It is an arithmetic number, because the mean of its divisors is an integer number (139226230).

Almost surely, 2^278452459 is an apocalyptic number.

278452459 is a deficient number, since it is larger than the sum of its proper divisors (1).

278452459 is an equidigital number, since it uses as much as digits as its factorization.

278452459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 46.

The square root of 278452459 is about 16686.8948279780. The cubic root of 278452459 is about 653.0057706214.

The spelling of 278452459 in words is "two hundred seventy-eight million, four hundred fifty-two thousand, four hundred fifty-nine".