3621488209 has 2 divisors, whose sum is σ = 3621488210. Its totient is φ = 3621488208.

The previous prime is 3621488191. The next prime is 3621488243. The reversal of 3621488209 is 9028841263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3609606400 + 11881809 = 60080^2 + 3447^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621488209 - 2¹³ = 3621480017 is a prime.

It is not a weakly prime, because it can be changed into another prime (3621488309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810744104 + 1810744105.

It is an arithmetic number, because the mean of its divisors is an integer number (1810744105).

Almost surely, 2^3621488209 is an apocalyptic number.

It is an amenable number.

3621488209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621488209 is an equidigital number, since it uses as much as digits as its factorization.

3621488209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 3621488209 is about 60178.8019904019. The cubic root of 3621488209 is about 1535.6621912070.

The spelling of 3621488209 in words is "three billion, six hundred twenty-one million, four hundred eighty-eight thousand, two hundred nine".