1316206109 has 2 divisors, whose sum is σ = 1316206110. Its totient is φ = 1316206108.

The previous prime is 1316206063. The next prime is 1316206141. The reversal of 1316206109 is 9016026131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659719225 + 656486884 = 25685^2 + 25622^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316206109 - 2⁸ = 1316205853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316206159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658103054 + 658103055.

It is an arithmetic number, because the mean of its divisors is an integer number (658103055).

Almost surely, 2^1316206109 is an apocalyptic number.

It is an amenable number.

1316206109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316206109 is an equidigital number, since it uses as much as digits as its factorization.

1316206109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1316206109 is about 36279.5549724635. The cubic root of 1316206109 is about 1095.9093546275.

The spelling of 1316206109 in words is "one billion, three hundred sixteen million, two hundred six thousand, one hundred nine".