1306686949 has 2 divisors, whose sum is σ = 1306686950. Its totient is φ = 1306686948.

The previous prime is 1306686923. The next prime is 1306686961. The reversal of 1306686949 is 9496866031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252664449 + 54022500 = 35393^2 + 7350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306686949 - 2¹⁹ = 1306162661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1306686896 and 1306686905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306686989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653343474 + 653343475.

It is an arithmetic number, because the mean of its divisors is an integer number (653343475).

Almost surely, 2^1306686949 is an apocalyptic number.

It is an amenable number.

1306686949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306686949 is an equidigital number, since it uses as much as digits as its factorization.

1306686949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 1306686949 is about 36148.1251104397. The cubic root of 1306686949 is about 1093.2609884112.

The spelling of 1306686949 in words is "one billion, three hundred six million, six hundred eighty-six thousand, nine hundred forty-nine".