981799 has 8 divisors (see below), whose sum is σ = 1208480. Its totient is φ = 776736.

The previous prime is 981797. The next prime is 981809. The reversal of 981799 is 997189.

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 981799 - 2¹ = 981797 is a prime.

981799 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981797) 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, 5304 + ... + 5485.

It is an arithmetic number, because the mean of its divisors is an integer number (151060).

2⁹⁸¹⁷⁹⁹ is an apocalyptic number.

981799 is a deficient number, since it is larger than the sum of its proper divisors (226681).

981799 is a wasteful number, since it uses less digits than its factorization.

981799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10809.

The product of its digits is 40824, while the sum is 43.

The square root of 981799 is about 990.8577092600. The cubic root of 981799 is about 99.3895814738.

The spelling of 981799 in words is "nine hundred eighty-one thousand, seven hundred ninety-nine".