981723 has 8 divisors (see below), whose sum is σ = 1315600. Its totient is φ = 651168.

The previous prime is 981713. The next prime is 981731. The reversal of 981723 is 327189.

It is a happy number.

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

It is not a de Polignac number, because 981723 - 2⁴ = 981707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981703) 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, 28 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (164450).

2⁹⁸¹⁷²³ is an apocalyptic number.

981723 is a deficient number, since it is larger than the sum of its proper divisors (333877).

981723 is a wasteful number, since it uses less digits than its factorization.

981723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661.

The product of its digits is 3024, while the sum is 30.

The square root of 981723 is about 990.8193579054. The cubic root of 981723 is about 99.3870168610.

The spelling of 981723 in words is "nine hundred eighty-one thousand, seven hundred twenty-three".