389967965 has 8 divisors (see below), whose sum is σ = 468222648. Its totient is φ = 311800320.

The previous prime is 389967953. The next prime is 389967983. The reversal of 389967965 is 569769983.

It can be written as a sum of positive squares in 4 ways, for example, as 53392249 + 336575716 = 7307^2 + 18346^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 389967965 - 2¹² = 389963869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389967898 and 389967907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11456 + ... + 30185.

It is an arithmetic number, because the mean of its divisors is an integer number (58527831).

Almost surely, 2^389967965 is an apocalyptic number.

It is an amenable number.

389967965 is a deficient number, since it is larger than the sum of its proper divisors (78254683).

389967965 is a wasteful number, since it uses less digits than its factorization.

389967965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43519.

The product of its digits is 22044960, while the sum is 62.

The square root of 389967965 is about 19747.6065638345. The cubic root of 389967965 is about 730.5943523876.

The spelling of 389967965 in words is "three hundred eighty-nine million, nine hundred sixty-seven thousand, nine hundred sixty-five".