389999996905669 has 2 divisors, whose sum is σ = 389999996905670. Its totient is φ = 389999996905668.

The previous prime is 389999996905591. The next prime is 389999996905711. The reversal of 389999996905669 is 966509699999983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230161880761569 + 159838116144100 = 15171087^2 + 12642710^2 .

It is a cyclic number.

It is not a de Polignac number, because 389999996905669 - 2⁹ = 389999996905157 is a prime.

It is a super-2 number, since 2×389999996905669² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389999996902669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194999998452834 + 194999998452835.

It is an arithmetic number, because the mean of its divisors is an integer number (194999998452835).

Almost surely, 2^{389999996905669} is an apocalyptic number.

It is an amenable number.

389999996905669 is a deficient number, since it is larger than the sum of its proper divisors (1).

389999996905669 is an equidigital number, since it uses as much as digits as its factorization.

389999996905669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1115771008320, while the sum is 106.

The spelling of 389999996905669 in words is "three hundred eighty-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-six million, nine hundred five thousand, six hundred sixty-nine".