389396869 has 2 divisors, whose sum is σ = 389396870. Its totient is φ = 389396868.

The previous prime is 389396801. The next prime is 389396893. The reversal of 389396869 is 968693983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265364100 + 124032769 = 16290^2 + 11137^2 .

It is a cyclic number.

It is not a de Polignac number, because 389396869 - 2¹³ = 389388677 is a prime.

It is a super-2 number, since 2×389396869² = 303259843174006322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389399869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194698434 + 194698435.

It is an arithmetic number, because the mean of its divisors is an integer number (194698435).

Almost surely, 2^389396869 is an apocalyptic number.

It is an amenable number.

389396869 is a deficient number, since it is larger than the sum of its proper divisors (1).

389396869 is an equidigital number, since it uses as much as digits as its factorization.

389396869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 61.

The square root of 389396869 is about 19733.1413870169. The cubic root of 389396869 is about 730.2375338848.

The spelling of 389396869 in words is "three hundred eighty-nine million, three hundred ninety-six thousand, eight hundred sixty-nine".