38393440289 has 2 divisors, whose sum is σ = 38393440290. Its totient is φ = 38393440288.

The previous prime is 38393440157. The next prime is 38393440303. The reversal of 38393440289 is 98204439383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35231290000 + 3162150289 = 187700^2 + 56233^2 .

It is a cyclic number.

It is not a de Polignac number, because 38393440289 - 2²⁸ = 38125004833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38393440289.

It is not a weakly prime, because it can be changed into another prime (38393440889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19196720144 + 19196720145.

It is an arithmetic number, because the mean of its divisors is an integer number (19196720145).

Almost surely, 2^38393440289 is an apocalyptic number.

It is an amenable number.

38393440289 is a deficient number, since it is larger than the sum of its proper divisors (1).

38393440289 is an equidigital number, since it uses as much as digits as its factorization.

38393440289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 38393440289 in words is "thirty-eight billion, three hundred ninety-three million, four hundred forty thousand, two hundred eighty-nine".