39009038857 has 2 divisors, whose sum is σ = 39009038858. Its totient is φ = 39009038856.

The previous prime is 39009038843. The next prime is 39009038867. The reversal of 39009038857 is 75883090093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29701420281 + 9307618576 = 172341^2 + 96476^2 .

It is a cyclic number.

It is not a de Polignac number, because 39009038857 - 2¹¹ = 39009036809 is a prime.

It is a super-2 number, since 2×39009038857² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39009038867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19504519428 + 19504519429.

It is an arithmetic number, because the mean of its divisors is an integer number (19504519429).

Almost surely, 2^39009038857 is an apocalyptic number.

It is an amenable number.

39009038857 is a deficient number, since it is larger than the sum of its proper divisors (1).

39009038857 is an equidigital number, since it uses as much as digits as its factorization.

39009038857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 39009038857 in words is "thirty-nine billion, nine million, thirty-eight thousand, eight hundred fifty-seven".