3687005209 has 2 divisors, whose sum is σ = 3687005210. Its totient is φ = 3687005208.

The previous prime is 3687005207. The next prime is 3687005213. The reversal of 3687005209 is 9025007863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3651543184 + 35462025 = 60428^2 + 5955^2 .

It is a cyclic number.

It is not a de Polignac number, because 3687005209 - 2¹ = 3687005207 is a prime.

It is a super-2 number, since 2×3687005209² = 27188014822386267362, which contains 22 as substring.

Together with 3687005207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3687005207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843502604 + 1843502605.

It is an arithmetic number, because the mean of its divisors is an integer number (1843502605).

Almost surely, 2^3687005209 is an apocalyptic number.

It is an amenable number.

3687005209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687005209 is an equidigital number, since it uses as much as digits as its factorization.

3687005209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 3687005209 is about 60720.7148261613. The cubic root of 3687005209 is about 1544.8675481947.

The spelling of 3687005209 in words is "three billion, six hundred eighty-seven million, five thousand, two hundred nine".