981718 has 4 divisors (see below), whose sum is σ = 1472580. Its totient is φ = 490858.

The previous prime is 981713. The next prime is 981731. The reversal of 981718 is 817189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 817189 = 47 ⋅17387.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981713) by changing a digit.

981718 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245428 + ... + 245431.

It is an arithmetic number, because the mean of its divisors is an integer number (368145).

2⁹⁸¹⁷¹⁸ is an apocalyptic number.

981718 is a deficient number, since it is larger than the sum of its proper divisors (490862).

981718 is a wasteful number, since it uses less digits than its factorization.

981718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490861.

The product of its digits is 4032, while the sum is 34.

The square root of 981718 is about 990.8168347379. The cubic root of 981718 is about 99.3868481318.

The spelling of 981718 in words is "nine hundred eighty-one thousand, seven hundred eighteen".