9867213 has 18 divisors (see below), whose sum is σ = 15047214. Its totient is φ = 6229872.

The previous prime is 9867211. The next prime is 9867233. The reversal of 9867213 is 3127689.

It can be written as a sum of positive squares in only one way, i.e., 9474084 + 393129 = 3078^2 + 627^2 .

It is not a de Polignac number, because 9867213 - 2¹ = 9867211 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9867211) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1731 + ... + 4767.

Almost surely, 2^9867213 is an apocalyptic number.

It is an amenable number.

9867213 is a deficient number, since it is larger than the sum of its proper divisors (5180001).

9867213 is a wasteful number, since it uses less digits than its factorization.

9867213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081 (or 3059 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 9867213 is about 3141.2120272277. The cubic root of 9867213 is about 214.4856136536.

The spelling of 9867213 in words is "nine million, eight hundred sixty-seven thousand, two hundred thirteen".