389578121 has 8 divisors (see below), whose sum is σ = 398184000. Its totient is φ = 381039120.

The previous prime is 389578087. The next prime is 389578129. The reversal of 389578121 is 121875983.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389578121 is a prime.

It is a super-2 number, since 2×389578121² = 303542224723781282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (389578129) 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, 4850 + ... + 28331.

It is an arithmetic number, because the mean of its divisors is an integer number (49773000).

Almost surely, 2^389578121 is an apocalyptic number.

It is an amenable number.

389578121 is a deficient number, since it is larger than the sum of its proper divisors (8605879).

389578121 is a wasteful number, since it uses less digits than its factorization.

389578121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33439.

The product of its digits is 120960, while the sum is 44.

The square root of 389578121 is about 19737.7334311719. The cubic root of 389578121 is about 730.3508171812.

The spelling of 389578121 in words is "three hundred eighty-nine million, five hundred seventy-eight thousand, one hundred twenty-one".