279285421169 has 2 divisors, whose sum is σ = 279285421170. Its totient is φ = 279285421168.

The previous prime is 279285421067. The next prime is 279285421231. The reversal of 279285421169 is 961124582972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166372620544 + 112912800625 = 407888^2 + 336025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279285421169 is a prime.

It is a super-2 number, since 2×279285421169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (279285421669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139642710584 + 139642710585.

It is an arithmetic number, because the mean of its divisors is an integer number (139642710585).

Almost surely, 2^279285421169 is an apocalyptic number.

It is an amenable number.

279285421169 is a deficient number, since it is larger than the sum of its proper divisors (1).

279285421169 is an equidigital number, since it uses as much as digits as its factorization.

279285421169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The spelling of 279285421169 in words is "two hundred seventy-nine billion, two hundred eighty-five million, four hundred twenty-one thousand, one hundred sixty-nine".