9957213 has 24 divisors (see below), whose sum is σ = 16713216. Its totient is φ = 5594400.

The previous prime is 9957203. The next prime is 9957247. The reversal of 9957213 is 3127599.

It is not a de Polignac number, because 9957213 - 2¹⁰ = 9956189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9957203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2548 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (696384).

Almost surely, 2^9957213 is an apocalyptic number.

It is an amenable number.

9957213 is a deficient number, since it is larger than the sum of its proper divisors (6756003).

9957213 is a wasteful number, since it uses less digits than its factorization.

9957213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2662 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 9957213 is about 3155.5051893477. The cubic root of 9957213 is about 215.1357570590.

The spelling of 9957213 in words is "nine million, nine hundred fifty-seven thousand, two hundred thirteen".