278046943 has 2 divisors, whose sum is σ = 278046944. Its totient is φ = 278046942.

The previous prime is 278046919. The next prime is 278046961. The reversal of 278046943 is 349640872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278046943 - 2²⁵ = 244492511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 278046943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278046343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139023471 + 139023472.

It is an arithmetic number, because the mean of its divisors is an integer number (139023472).

Almost surely, 2^278046943 is an apocalyptic number.

278046943 is a deficient number, since it is larger than the sum of its proper divisors (1).

278046943 is an equidigital number, since it uses as much as digits as its factorization.

278046943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 278046943 is about 16674.7396681328. The cubic root of 278046943 is about 652.6886214035.

The spelling of 278046943 in words is "two hundred seventy-eight million, forty-six thousand, nine hundred forty-three".