278795159 has 2 divisors, whose sum is σ = 278795160. Its totient is φ = 278795158.

The previous prime is 278795129. The next prime is 278795161. The reversal of 278795159 is 951597872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278795159 - 2¹² = 278791063 is a prime.

Together with 278795161, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 278795159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278795129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139397579 + 139397580.

It is an arithmetic number, because the mean of its divisors is an integer number (139397580).

Almost surely, 2^278795159 is an apocalyptic number.

278795159 is a deficient number, since it is larger than the sum of its proper divisors (1).

278795159 is an equidigital number, since it uses as much as digits as its factorization.

278795159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 53.

The square root of 278795159 is about 16697.1602076521. The cubic root of 278795159 is about 653.2735522202.

The spelling of 278795159 in words is "two hundred seventy-eight million, seven hundred ninety-five thousand, one hundred fifty-nine".