1306690109 has 2 divisors, whose sum is σ = 1306690110. Its totient is φ = 1306690108.

The previous prime is 1306690093. The next prime is 1306690111. The reversal of 1306690109 is 9010966031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1265794084 + 40896025 = 35578^2 + 6395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306690109 - 2⁴ = 1306690093 is a prime.

Together with 1306690111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306690129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653345054 + 653345055.

It is an arithmetic number, because the mean of its divisors is an integer number (653345055).

Almost surely, 2^1306690109 is an apocalyptic number.

It is an amenable number.

1306690109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306690109 is an equidigital number, since it uses as much as digits as its factorization.

1306690109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 1306690109 is about 36148.1688194575. The cubic root of 1306690109 is about 1093.2618696990.

The spelling of 1306690109 in words is "one billion, three hundred six million, six hundred ninety thousand, one hundred nine".