3681716609 has 2 divisors, whose sum is σ = 3681716610. Its totient is φ = 3681716608.

The previous prime is 3681716567. The next prime is 3681716611. The reversal of 3681716609 is 9066171863.

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., 3383981584 + 297735025 = 58172^2 + 17255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3681716609 is a prime.

Together with 3681716611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3681716629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840858304 + 1840858305.

It is an arithmetic number, because the mean of its divisors is an integer number (1840858305).

Almost surely, 2^3681716609 is an apocalyptic number.

It is an amenable number.

3681716609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681716609 is an equidigital number, since it uses as much as digits as its factorization.

3681716609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 3681716609 is about 60677.1506334963. The cubic root of 3681716609 is about 1544.1285476982.

The spelling of 3681716609 in words is "three billion, six hundred eighty-one million, seven hundred sixteen thousand, six hundred nine".