1004989 has 8 divisors (see below), whose sum is σ = 1099008. Its totient is φ = 914880.

The previous prime is 1004987. The next prime is 1005007. The reversal of 1004989 is 9894001.

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 1004989 - 2¹ = 1004987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004981) 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, 427 + ... + 1480.

It is an arithmetic number, because the mean of its divisors is an integer number (137376).

2^1004989 is an apocalyptic number.

It is an amenable number.

1004989 is a deficient number, since it is larger than the sum of its proper divisors (94019).

1004989 is a wasteful number, since it uses less digits than its factorization.

1004989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1004989 is about 1002.4913964718. The cubic root of 1004989 is about 100.1660242071.

The spelling of 1004989 in words is "one million, four thousand, nine hundred eighty-nine".