278052961 has 2 divisors, whose sum is σ = 278052962. Its totient is φ = 278052960.

The previous prime is 278052953. The next prime is 278052979. The reversal of 278052961 is 169250872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277022736 + 1030225 = 16644^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 278052961 - 2³ = 278052953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (278052941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139026480 + 139026481.

It is an arithmetic number, because the mean of its divisors is an integer number (139026481).

Almost surely, 2^278052961 is an apocalyptic number.

It is an amenable number.

278052961 is a deficient number, since it is larger than the sum of its proper divisors (1).

278052961 is an equidigital number, since it uses as much as digits as its factorization.

278052961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 278052961 is about 16674.9201197487. The cubic root of 278052961 is about 652.6933302628.

The spelling of 278052961 in words is "two hundred seventy-eight million, fifty-two thousand, nine hundred sixty-one".