389491 has 4 divisors (see below), whose sum is σ = 392472. Its totient is φ = 386512.

The previous prime is 389483. The next prime is 389507. The reversal of 389491 is 194983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194983 = 73 ⋅2671.

It is a cyclic number.

It is not a de Polignac number, because 389491 - 2³ = 389483 is a prime.

It is a Duffinian number.

389491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (389401) 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, 1285 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (98118).

2³⁸⁹⁴⁹¹ is an apocalyptic number.

389491 is a deficient number, since it is larger than the sum of its proper divisors (2981).

389491 is a wasteful number, since it uses less digits than its factorization.

389491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980.

The product of its digits is 7776, while the sum is 34.

The square root of 389491 is about 624.0921406331. The cubic root of 389491 is about 73.0296370560.

The spelling of 389491 in words is "three hundred eighty-nine thousand, four hundred ninety-one".