1305949273 has 2 divisors, whose sum is σ = 1305949274. Its totient is φ = 1305949272.

The previous prime is 1305949219. The next prime is 1305949279. The reversal of 1305949273 is 3729495031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227591369 + 78357904 = 35037^2 + 8852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305949273 - 2²⁵ = 1272394841 is a prime.

It is a super-3 number, since 3×1305949273³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1305949279) 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, 652974636 + 652974637.

It is an arithmetic number, because the mean of its divisors is an integer number (652974637).

Almost surely, 2^1305949273 is an apocalyptic number.

It is an amenable number.

1305949273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305949273 is an equidigital number, since it uses as much as digits as its factorization.

1305949273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 1305949273 is about 36137.9201532130. The cubic root of 1305949273 is about 1093.0552201250.

The spelling of 1305949273 in words is "one billion, three hundred five million, nine hundred forty-nine thousand, two hundred seventy-three".