389023031 has 4 divisors (see below), whose sum is σ = 389138832. Its totient is φ = 388907232.

The previous prime is 389023009. The next prime is 389023067. The reversal of 389023031 is 130320983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389023031 - 2²⁶ = 321914167 is a prime.

It is a super-2 number, since 2×389023031² = 302677837296853922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389022985 and 389023003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389023231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52706 + ... + 59631.

It is an arithmetic number, because the mean of its divisors is an integer number (97284708).

Almost surely, 2^389023031 is an apocalyptic number.

389023031 is a deficient number, since it is larger than the sum of its proper divisors (115801).

389023031 is a wasteful number, since it uses less digits than its factorization.

389023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115800.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 389023031 is about 19723.6667737011. Note that the first 3 decimals coincide. The cubic root of 389023031 is about 730.0037724206.

The spelling of 389023031 in words is "three hundred eighty-nine million, twenty-three thousand, thirty-one".