389881424209 has 2 divisors, whose sum is σ = 389881424210. Its totient is φ = 389881424208.

The previous prime is 389881424201. The next prime is 389881424213. The reversal of 389881424209 is 902424188983.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388696137025 + 1185287184 = 623455^2 + 34428^2 .

It is a cyclic number.

It is not a de Polignac number, because 389881424209 - 2³ = 389881424201 is a prime.

It is a super-2 number, since 2×389881424209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389881424201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194940712104 + 194940712105.

It is an arithmetic number, because the mean of its divisors is an integer number (194940712105).

Almost surely, 2^389881424209 is an apocalyptic number.

It is an amenable number.

389881424209 is a deficient number, since it is larger than the sum of its proper divisors (1).

389881424209 is an equidigital number, since it uses as much as digits as its factorization.

389881424209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7962624, while the sum is 58.

The spelling of 389881424209 in words is "three hundred eighty-nine billion, eight hundred eighty-one million, four hundred twenty-four thousand, two hundred nine".