368638609 has 2 divisors, whose sum is σ = 368638610. Its totient is φ = 368638608.

The previous prime is 368638601. The next prime is 368638643. The reversal of 368638609 is 906836863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349690000 + 18948609 = 18700^2 + 4353^2 .

It is a cyclic number.

It is not a de Polignac number, because 368638609 - 2³ = 368638601 is a prime.

It is not a weakly prime, because it can be changed into another prime (368638601) 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, 184319304 + 184319305.

It is an arithmetic number, because the mean of its divisors is an integer number (184319305).

Almost surely, 2^368638609 is an apocalyptic number.

It is an amenable number.

368638609 is a deficient number, since it is larger than the sum of its proper divisors (1).

368638609 is an equidigital number, since it uses as much as digits as its factorization.

368638609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 368638609 is about 19199.9637760075. The cubic root of 368638609 is about 717.0238575912.

The spelling of 368638609 in words is "three hundred sixty-eight million, six hundred thirty-eight thousand, six hundred nine".