3631906009 has 2 divisors, whose sum is σ = 3631906010. Its totient is φ = 3631906008.

The previous prime is 3631906007. The next prime is 3631906013. The reversal of 3631906009 is 9006091363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3514118400 + 117787609 = 59280^2 + 10853^2 .

It is a cyclic number.

It is not a de Polignac number, because 3631906009 - 2¹ = 3631906007 is a prime.

Together with 3631906007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3631906007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815953004 + 1815953005.

It is an arithmetic number, because the mean of its divisors is an integer number (1815953005).

Almost surely, 2^3631906009 is an apocalyptic number.

It is an amenable number.

3631906009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3631906009 is an equidigital number, since it uses as much as digits as its factorization.

3631906009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 3631906009 is about 60265.2968880101. The cubic root of 3631906009 is about 1537.1333088458.

The spelling of 3631906009 in words is "three billion, six hundred thirty-one million, nine hundred six thousand, nine".