1278965353 has 2 divisors, whose sum is σ = 1278965354. Its totient is φ = 1278965352.

The previous prime is 1278965341. The next prime is 1278965381. The reversal of 1278965353 is 3535698721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067786329 + 211179024 = 32677^2 + 14532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1278965353 - 2⁵ = 1278965321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278965297 and 1278965306.

It is not a weakly prime, because it can be changed into another prime (1278965953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639482676 + 639482677.

It is an arithmetic number, because the mean of its divisors is an integer number (639482677).

Almost surely, 2^1278965353 is an apocalyptic number.

It is an amenable number.

1278965353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278965353 is an equidigital number, since it uses as much as digits as its factorization.

1278965353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The square root of 1278965353 is about 35762.6250854156. The cubic root of 1278965353 is about 1085.4744194406.

The spelling of 1278965353 in words is "one billion, two hundred seventy-eight million, nine hundred sixty-five thousand, three hundred fifty-three".