1306795981 has 2 divisors, whose sum is σ = 1306795982. Its totient is φ = 1306795980.

The previous prime is 1306795969. The next prime is 1306796027. The reversal of 1306795981 is 1895976031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1306171881 + 624100 = 36141^2 + 790^2 .

It is an emirp because it is prime and its reverse (1895976031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1306795981 - 2²³ = 1298407373 is a prime.

It is a super-2 number, since 2×1306795981² = 3415431471915504722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306795901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653397990 + 653397991.

It is an arithmetic number, because the mean of its divisors is an integer number (653397991).

Almost surely, 2^1306795981 is an apocalyptic number.

It is an amenable number.

1306795981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306795981 is an equidigital number, since it uses as much as digits as its factorization.

1306795981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1306795981 is about 36149.6332069912. The cubic root of 1306795981 is about 1093.2913953670.

The spelling of 1306795981 in words is "one billion, three hundred six million, seven hundred ninety-five thousand, nine hundred eighty-one".