9981313 has 4 divisors (see below), whose sum is σ = 9987840. Its totient is φ = 9974788.

The previous prime is 9981271. The next prime is 9981317. The reversal of 9981313 is 3131899.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9981313 - 2¹³ = 9973121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9981317) 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, 408 + ... + 4486.

It is an arithmetic number, because the mean of its divisors is an integer number (2496960).

Almost surely, 2^9981313 is an apocalyptic number.

It is an amenable number.

9981313 is a deficient number, since it is larger than the sum of its proper divisors (6527).

9981313 is a wasteful number, since it uses less digits than its factorization.

9981313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526.

The product of its digits is 5832, while the sum is 34.

The square root of 9981313 is about 3159.3216043955. The cubic root of 9981313 is about 215.3091855864.

The spelling of 9981313 in words is "nine million, nine hundred eighty-one thousand, three hundred thirteen".