389588081 has 4 divisors (see below), whose sum is σ = 389819892. Its totient is φ = 389356272.

The previous prime is 389588057. The next prime is 389588083. The reversal of 389588081 is 180885983.

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 297735025 + 91853056 = 17255^2 + 9584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389588081 is a prime.

It is a super-2 number, since 2×389588081² = 303557745714525122, 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 (389588083) 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, 113366 + ... + 116751.

It is an arithmetic number, because the mean of its divisors is an integer number (97454973).

Almost surely, 2^389588081 is an apocalyptic number.

It is an amenable number.

389588081 is a deficient number, since it is larger than the sum of its proper divisors (231811).

389588081 is a wasteful number, since it uses less digits than its factorization.

389588081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231810.

The product of its (nonzero) digits is 552960, while the sum is 50.

The square root of 389588081 is about 19737.9857381649. The cubic root of 389588081 is about 730.3570412064.

The spelling of 389588081 in words is "three hundred eighty-nine million, five hundred eighty-eight thousand, eighty-one".