389443973 has 6 divisors (see below), whose sum is σ = 413700306. Its totient is φ = 366535232.

The previous prime is 389443963. The next prime is 389443993. The reversal of 389443973 is 379344983.

It can be written as a sum of positive squares in 3 ways, for example, as 111154849 + 278289124 = 10543^2 + 16682^2 .

It is not a de Polignac number, because 389443973 - 2¹² = 389439877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389443903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673490 + ... + 674067.

It is an arithmetic number, because the mean of its divisors is an integer number (68950051).

Almost surely, 2^389443973 is an apocalyptic number.

It is an amenable number.

389443973 is a deficient number, since it is larger than the sum of its proper divisors (24256333).

389443973 is a wasteful number, since it uses less digits than its factorization.

389443973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347591 (or 1347574 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 50.

The square root of 389443973 is about 19734.3348760479. The cubic root of 389443973 is about 730.2669774719.

The spelling of 389443973 in words is "three hundred eighty-nine million, four hundred forty-three thousand, nine hundred seventy-three".