38948669209 has 2 divisors, whose sum is σ = 38948669210. Its totient is φ = 38948669208.

The previous prime is 38948669197. The next prime is 38948669239. The reversal of 38948669209 is 90296684983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36666505225 + 2282163984 = 191485^2 + 47772^2 .

It is a cyclic number.

It is not a de Polignac number, because 38948669209 - 2⁹ = 38948668697 is a prime.

It is not a weakly prime, because it can be changed into another prime (38948669239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19474334604 + 19474334605.

It is an arithmetic number, because the mean of its divisors is an integer number (19474334605).

Almost surely, 2^38948669209 is an apocalyptic number.

It is an amenable number.

38948669209 is a deficient number, since it is larger than the sum of its proper divisors (1).

38948669209 is an equidigital number, since it uses as much as digits as its factorization.

38948669209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40310784, while the sum is 64.

The spelling of 38948669209 in words is "thirty-eight billion, nine hundred forty-eight million, six hundred sixty-nine thousand, two hundred nine".