389668969 has 4 divisors (see below), whose sum is σ = 403105860. Its totient is φ = 376232080.

The previous prime is 389668933. The next prime is 389668973. The reversal of 389668969 is 969866983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205062400 + 184606569 = 14320^2 + 13587^2 .

It is not a de Polignac number, because 389668969 - 2⁹ = 389668457 is a prime.

It is a super-2 number, since 2×389668969² = 303683810803045922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 389668969.

It is not an unprimeable number, because it can be changed into a prime (389668999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6718402 + ... + 6718459.

It is an arithmetic number, because the mean of its divisors is an integer number (100776465).

Almost surely, 2^389668969 is an apocalyptic number.

It is an amenable number.

389668969 is a deficient number, since it is larger than the sum of its proper divisors (13436891).

389668969 is a wasteful number, since it uses less digits than its factorization.

389668969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436890.

The product of its digits is 30233088, while the sum is 64.

The square root of 389668969 is about 19740.0346757548. The cubic root of 389668969 is about 730.4075843614.

The spelling of 389668969 in words is "three hundred eighty-nine million, six hundred sixty-eight thousand, nine hundred sixty-nine".