389239081 has 8 divisors (see below), whose sum is σ = 485285184. Its totient is φ = 303303120.

The previous prime is 389239079. The next prime is 389239087. The reversal of 389239081 is 180932983.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 389239081 - 2¹ = 389239079 is a prime.

It is a super-2 number, since 2×389239081² = 303014124355449122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389239087) 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, 2527450 + ... + 2527603.

It is an arithmetic number, because the mean of its divisors is an integer number (60660648).

Almost surely, 2^389239081 is an apocalyptic number.

It is an amenable number.

389239081 is a deficient number, since it is larger than the sum of its proper divisors (96046103).

389239081 is a wasteful number, since it uses less digits than its factorization.

389239081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055071.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 389239081 is about 19729.1429362758. The cubic root of 389239081 is about 730.1388870664.

The spelling of 389239081 in words is "three hundred eighty-nine million, two hundred thirty-nine thousand, eighty-one".