989493 has 8 divisors (see below), whose sum is σ = 1326048. Its totient is φ = 656304.

The previous prime is 989479. The next prime is 989507. The reversal of 989493 is 394989.

It is an interprime number because it is at equal distance from previous prime (989479) and next prime (989507).

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

It is not a de Polignac number, because 989493 - 2⁴ = 989477 is a prime.

989493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (165756).

2⁹⁸⁹⁴⁹³ is an apocalyptic number.

It is an amenable number.

989493 is a deficient number, since it is larger than the sum of its proper divisors (336555).

989493 is a wasteful number, since it uses less digits than its factorization.

989493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683.

The product of its digits is 69984, while the sum is 42.

The square root of 989493 is about 994.7326273929. The cubic root of 989493 is about 99.6485328221.

It can be divided in two parts, 98 and 9493, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 989493 in words is "nine hundred eighty-nine thousand, four hundred ninety-three".