278052979 has 2 divisors, whose sum is σ = 278052980. Its totient is φ = 278052978.

The previous prime is 278052961. The next prime is 278052989. The reversal of 278052979 is 979250872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278052979 - 2⁵ = 278052947 is a prime.

It is not a weakly prime, because it can be changed into another prime (278052989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139026489 + 139026490.

It is an arithmetic number, because the mean of its divisors is an integer number (139026490).

Almost surely, 2^278052979 is an apocalyptic number.

278052979 is a deficient number, since it is larger than the sum of its proper divisors (1).

278052979 is an equidigital number, since it uses as much as digits as its factorization.

278052979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 278052979 is about 16674.9206594814. The cubic root of 278052979 is about 652.6933443470.

The spelling of 278052979 in words is "two hundred seventy-eight million, fifty-two thousand, nine hundred seventy-nine".