8391489 has 16 divisors (see below), whose sum is σ = 12169728. Its totient is φ = 5121792.

The previous prime is 8391479. The next prime is 8391491. The reversal of 8391489 is 9841938.

It is not a de Polignac number, because 8391489 - 2⁵ = 8391457 is a prime.

8391489 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8391489.

It is not an unprimeable number, because it can be changed into a prime (8391479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337 + ... + 4110.

It is an arithmetic number, because the mean of its divisors is an integer number (760608).

Almost surely, 2^8391489 is an apocalyptic number.

It is an amenable number.

8391489 is a deficient number, since it is larger than the sum of its proper divisors (3778239).

8391489 is a wasteful number, since it uses less digits than its factorization.

8391489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504.

The product of its digits is 62208, while the sum is 42.

The square root of 8391489 is about 2896.8066901331. The cubic root of 8391489 is about 203.2105930085.

The spelling of 8391489 in words is "eight million, three hundred ninety-one thousand, four hundred eighty-nine".