389954869 has 2 divisors, whose sum is σ = 389954870. Its totient is φ = 389954868.

The previous prime is 389954861. The next prime is 389954881. The reversal of 389954869 is 968459983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283080625 + 106874244 = 16825^2 + 10338^2 .

It is a cyclic number.

It is not a de Polignac number, because 389954869 - 2³ = 389954861 is a prime.

It is a super-2 number, since 2×389954869² = 304129599713614322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389954861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194977434 + 194977435.

It is an arithmetic number, because the mean of its divisors is an integer number (194977435).

Almost surely, 2^389954869 is an apocalyptic number.

It is an amenable number.

389954869 is a deficient number, since it is larger than the sum of its proper divisors (1).

389954869 is an equidigital number, since it uses as much as digits as its factorization.

389954869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 61.

The square root of 389954869 is about 19747.2749765632. The cubic root of 389954869 is about 730.5861739631.

The spelling of 389954869 in words is "three hundred eighty-nine million, nine hundred fifty-four thousand, eight hundred sixty-nine".