9981513 has 6 divisors (see below), whose sum is σ = 14417754. Its totient is φ = 6654336.

The previous prime is 9981467. The next prime is 9981551. The reversal of 9981513 is 3151899.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7767369 + 2214144 = 2787^2 + 1488^2 .

It is not a de Polignac number, because 9981513 - 2⁹ = 9981001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 554520 + ... + 554537.

It is an arithmetic number, because the mean of its divisors is an integer number (2402959).

Almost surely, 2^9981513 is an apocalyptic number.

It is an amenable number.

9981513 is a deficient number, since it is larger than the sum of its proper divisors (4436241).

9981513 is a wasteful number, since it uses less digits than its factorization.

9981513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109063 (or 1109060 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 9981513 is about 3159.3532566017. The cubic root of 9981513 is about 215.3106236587.

The spelling of 9981513 in words is "nine million, nine hundred eighty-one thousand, five hundred thirteen".