3694631209 has 2 divisors, whose sum is σ = 3694631210. Its totient is φ = 3694631208.

The previous prime is 3694631201. The next prime is 3694631249. The reversal of 3694631209 is 9021364963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3317184025 + 377447184 = 57595^2 + 19428^2 .

It is a cyclic number.

It is not a de Polignac number, because 3694631209 - 2³ = 3694631201 is a prime.

It is not a weakly prime, because it can be changed into another prime (3694631201) 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, 1847315604 + 1847315605.

It is an arithmetic number, because the mean of its divisors is an integer number (1847315605).

Almost surely, 2^3694631209 is an apocalyptic number.

It is an amenable number.

3694631209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3694631209 is an equidigital number, since it uses as much as digits as its factorization.

3694631209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 3694631209 is about 60783.4780923237. The cubic root of 3694631209 is about 1545.9319212268.

The spelling of 3694631209 in words is "three billion, six hundred ninety-four million, six hundred thirty-one thousand, two hundred nine".