1306780229 has 2 divisors, whose sum is σ = 1306780230. Its totient is φ = 1306780228.

The previous prime is 1306780219. The next prime is 1306780253. The reversal of 1306780229 is 9220876031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274347204 + 32433025 = 35698^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306780229 - 2¹⁶ = 1306714693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1306780192 and 1306780201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306780219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653390114 + 653390115.

It is an arithmetic number, because the mean of its divisors is an integer number (653390115).

Almost surely, 2^1306780229 is an apocalyptic number.

It is an amenable number.

1306780229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306780229 is an equidigital number, since it uses as much as digits as its factorization.

1306780229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1306780229 is about 36149.4153341378. The cubic root of 1306780229 is about 1093.2870025376.

The spelling of 1306780229 in words is "one billion, three hundred six million, seven hundred eighty thousand, two hundred twenty-nine".