981489 has 4 divisors (see below), whose sum is σ = 1308656. Its totient is φ = 654324.

The previous prime is 981481. The next prime is 981493. The reversal of 981489 is 984189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984189 = 3 ⋅328063.

It is not a de Polignac number, because 981489 - 2³ = 981481 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981489.

It is not an unprimeable number, because it can be changed into a prime (981481) 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, 163579 + ... + 163584.

It is an arithmetic number, because the mean of its divisors is an integer number (327164).

2⁹⁸¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

981489 is a deficient number, since it is larger than the sum of its proper divisors (327167).

981489 is a wasteful number, since it uses less digits than its factorization.

981489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327166.

The product of its digits is 20736, while the sum is 39.

The square root of 981489 is about 990.7012667803. The cubic root of 981489 is about 99.3791197216.

The spelling of 981489 in words is "nine hundred eighty-one thousand, four hundred eighty-nine".