38238209 has 2 divisors, whose sum is σ = 38238210. Its totient is φ = 38238208.

The previous prime is 38238197. The next prime is 38238229. The reversal of 38238209 is 90283283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 107584 = 6175^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 38238209 - 2¹² = 38234113 is a prime.

It is not a weakly prime, because it can be changed into another prime (38238229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19119104 + 19119105.

It is an arithmetic number, because the mean of its divisors is an integer number (19119105).

Almost surely, 2^38238209 is an apocalyptic number.

It is an amenable number.

38238209 is a deficient number, since it is larger than the sum of its proper divisors (1).

38238209 is an equidigital number, since it uses as much as digits as its factorization.

38238209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 38238209 is about 6183.7051191013. The cubic root of 38238209 is about 336.8985803108.

The spelling of 38238209 in words is "thirty-eight million, two hundred thirty-eight thousand, two hundred nine".