389045389 has 2 divisors, whose sum is σ = 389045390. Its totient is φ = 389045388.

The previous prime is 389045383. The next prime is 389045399. The reversal of 389045389 is 983540983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381889764 + 7155625 = 19542^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 389045389 - 2¹¹ = 389043341 is a prime.

It is a super-2 number, since 2×389045389² = 302712629404322642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389045383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194522694 + 194522695.

It is an arithmetic number, because the mean of its divisors is an integer number (194522695).

Almost surely, 2^389045389 is an apocalyptic number.

It is an amenable number.

389045389 is a deficient number, since it is larger than the sum of its proper divisors (1).

389045389 is an equidigital number, since it uses as much as digits as its factorization.

389045389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 389045389 is about 19724.2335465792. The cubic root of 389045389 is about 730.0177571211.

The spelling of 389045389 in words is "three hundred eighty-nine million, forty-five thousand, three hundred eighty-nine".