389999996906389 has 2 divisors, whose sum is σ = 389999996906390. Its totient is φ = 389999996906388.

The previous prime is 389999996906287. The next prime is 389999996906413. The reversal of 389999996906389 is 983609699999983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325725431058225 + 64274565848164 = 18047865^2 + 8017142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389999996906389 is a prime.

It is a super-3 number, since 3×389999996906389³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 389999996906291 and 389999996906300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389999996909389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194999998453194 + 194999998453195.

It is an arithmetic number, because the mean of its divisors is an integer number (194999998453195).

Almost surely, 2^{389999996906389} is an apocalyptic number.

It is an amenable number.

389999996906389 is a deficient number, since it is larger than the sum of its proper divisors (1).

389999996906389 is an equidigital number, since it uses as much as digits as its factorization.

389999996906389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 892616806656, while the sum is 106.

The spelling of 389999996906389 in words is "three hundred eighty-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-six million, nine hundred six thousand, three hundred eighty-nine".