989403 has 4 divisors (see below), whose sum is σ = 1319208. Its totient is φ = 659600.

The previous prime is 989381. The next prime is 989411. The reversal of 989403 is 304989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304989 = 3 ⋅101663.

It is a cyclic number.

It is not a de Polignac number, because 989403 - 2¹² = 985307 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (989423) 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, 164898 + ... + 164903.

It is an arithmetic number, because the mean of its divisors is an integer number (329802).

2⁹⁸⁹⁴⁰³ is an apocalyptic number.

989403 is a deficient number, since it is larger than the sum of its proper divisors (329805).

989403 is a wasteful number, since it uses less digits than its factorization.

989403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329804.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 989403 is about 994.6873880773. The cubic root of 989403 is about 99.6455115308.

The spelling of 989403 in words is "nine hundred eighty-nine thousand, four hundred three".