38669909 has 2 divisors, whose sum is σ = 38669910. Its totient is φ = 38669908.

The previous prime is 38669903. The next prime is 38669987. The reversal of 38669909 is 90996683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 4774225 = 5822^2 + 2185^2 .

It is an emirp because it is prime and its reverse (90996683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38669909 - 2⁴ = 38669893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38669903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19334954 + 19334955.

It is an arithmetic number, because the mean of its divisors is an integer number (19334955).

Almost surely, 2^38669909 is an apocalyptic number.

It is an amenable number.

38669909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38669909 is an equidigital number, since it uses as much as digits as its factorization.

38669909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 38669909 is about 6218.5134075597. The cubic root of 38669909 is about 338.1616729447.

The spelling of 38669909 in words is "thirty-eight million, six hundred sixty-nine thousand, nine hundred nine".