278163113 has 2 divisors, whose sum is σ = 278163114. Its totient is φ = 278163112.

The previous prime is 278163107. The next prime is 278163169. The reversal of 278163113 is 311361872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253828624 + 24334489 = 15932^2 + 4933^2 .

It is a cyclic number.

It is not a de Polignac number, because 278163113 - 2¹⁰ = 278162089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 278163113.

It is not a weakly prime, because it can be changed into another prime (278163103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139081556 + 139081557.

It is an arithmetic number, because the mean of its divisors is an integer number (139081557).

Almost surely, 2^278163113 is an apocalyptic number.

It is an amenable number.

278163113 is a deficient number, since it is larger than the sum of its proper divisors (1).

278163113 is an equidigital number, since it uses as much as digits as its factorization.

278163113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 278163113 is about 16678.2227170643. Note that the first 3 decimals coincide. The cubic root of 278163113 is about 652.7795080706.

The spelling of 278163113 in words is "two hundred seventy-eight million, one hundred sixty-three thousand, one hundred thirteen".