1306647697 has 2 divisors, whose sum is σ = 1306647698. Its totient is φ = 1306647696.

The previous prime is 1306647653. The next prime is 1306647703. The reversal of 1306647697 is 7967466031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1291971136 + 14676561 = 35944^2 + 3831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306647697 - 2⁷ = 1306647569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1306647697.

It is not a weakly prime, because it can be changed into another prime (1306647607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653323848 + 653323849.

It is an arithmetic number, because the mean of its divisors is an integer number (653323849).

Almost surely, 2^1306647697 is an apocalyptic number.

It is an amenable number.

1306647697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306647697 is an equidigital number, since it uses as much as digits as its factorization.

1306647697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 1306647697 is about 36147.5821736392. The cubic root of 1306647697 is about 1093.2500413592.

The spelling of 1306647697 in words is "one billion, three hundred six million, six hundred forty-seven thousand, six hundred ninety-seven".