389218973 has 8 divisors (see below), whose sum is σ = 457264416. Its totient is φ = 326617200.

The previous prime is 389218969. The next prime is 389218987. The reversal of 389218973 is 379812983.

It is a happy number.

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

It is not a de Polignac number, because 389218973 - 2² = 389218969 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 (389218993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360763 + ... + 1361048.

It is an arithmetic number, because the mean of its divisors is an integer number (57158052).

Almost surely, 2^389218973 is an apocalyptic number.

It is an amenable number.

389218973 is a deficient number, since it is larger than the sum of its proper divisors (68045443).

389218973 is a wasteful number, since it uses less digits than its factorization.

389218973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721835.

The product of its digits is 653184, while the sum is 50.

The square root of 389218973 is about 19728.6333282364. The cubic root of 389218973 is about 730.1263139151.

The spelling of 389218973 in words is "three hundred eighty-nine million, two hundred eighteen thousand, nine hundred seventy-three".