3642218309 has 2 divisors, whose sum is σ = 3642218310. Its totient is φ = 3642218308.

The previous prime is 3642218297. The next prime is 3642218339. The reversal of 3642218309 is 9038122463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2699114209 + 943104100 = 51953^2 + 30710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3642218309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3642218339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821109154 + 1821109155.

It is an arithmetic number, because the mean of its divisors is an integer number (1821109155).

Almost surely, 2^3642218309 is an apocalyptic number.

It is an amenable number.

3642218309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3642218309 is an equidigital number, since it uses as much as digits as its factorization.

3642218309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 3642218309 is about 60350.7937727417. The cubic root of 3642218309 is about 1538.5867606325.

The spelling of 3642218309 in words is "three billion, six hundred forty-two million, two hundred eighteen thousand, three hundred nine".