9923513 has 4 divisors (see below), whose sum is σ = 9937380. Its totient is φ = 9909648.

The previous prime is 9923509. The next prime is 9923521. The reversal of 9923513 is 3153299.

9923513 = 2227² + 2228².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4963984 + 4959529 = 2228^2 + 2227^2 .

It is a cyclic number.

It is not a de Polignac number, because 9923513 - 2² = 9923509 is a prime.

It is a super-2 number, since 2×9923513² = 196952220522338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9923513.

It is not an unprimeable number, because it can be changed into a prime (9923113) 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, 5798 + ... + 7311.

It is an arithmetic number, because the mean of its divisors is an integer number (2484345).

Almost surely, 2^9923513 is an apocalyptic number.

9923513 is the 2228-th centered square number.

It is an amenable number.

9923513 is a deficient number, since it is larger than the sum of its proper divisors (13867).

9923513 is a wasteful number, since it uses less digits than its factorization.

9923513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13866.

The product of its digits is 7290, while the sum is 32.

The square root of 9923513 is about 3150.1607895471. The cubic root of 9923513 is about 214.8927750896.

The spelling of 9923513 in words is "nine million, nine hundred twenty-three thousand, five hundred thirteen".