981313 has 4 divisors (see below), whose sum is σ = 1002240. Its totient is φ = 960388.

The previous prime is 981311. The next prime is 981319. The reversal of 981313 is 313189.

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: 313189 = 107 ⋅2927.

It is a cyclic number.

It is not a de Polignac number, because 981313 - 2¹ = 981311 is a prime.

It is a Duffinian number.

981313 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (981311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10393 + ... + 10486.

It is an arithmetic number, because the mean of its divisors is an integer number (250560).

2⁹⁸¹³¹³ is an apocalyptic number.

It is an amenable number.

981313 is a deficient number, since it is larger than the sum of its proper divisors (20927).

981313 is a wasteful number, since it uses less digits than its factorization.

981313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20926.

The product of its digits is 648, while the sum is 25.

The square root of 981313 is about 990.6124368289. The cubic root of 981313 is about 99.3731791658.

The spelling of 981313 in words is "nine hundred eighty-one thousand, three hundred thirteen".