3684278309 has 2 divisors, whose sum is σ = 3684278310. Its totient is φ = 3684278308.

The previous prime is 3684278281. The next prime is 3684278341. The reversal of 3684278309 is 9038724863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3460027684 + 224250625 = 58822^2 + 14975^2 .

It is a cyclic number.

It is not a de Polignac number, because 3684278309 - 2¹² = 3684274213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3684278009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842139154 + 1842139155.

It is an arithmetic number, because the mean of its divisors is an integer number (1842139155).

Almost surely, 2^3684278309 is an apocalyptic number.

It is an amenable number.

3684278309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3684278309 is an equidigital number, since it uses as much as digits as its factorization.

3684278309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 3684278309 is about 60698.2562270120. The cubic root of 3684278309 is about 1544.4865941798.

The spelling of 3684278309 in words is "three billion, six hundred eighty-four million, two hundred seventy-eight thousand, three hundred nine".