9912213 has 14 divisors (see below), whose sum is σ = 14862614. Its totient is φ = 6607656.

The previous prime is 9912211. The next prime is 9912251. The reversal of 9912213 is 3122199.

It can be written as a sum of positive squares in only one way, i.e., 6441444 + 3470769 = 2538^2 + 1863^2 .

It is not a de Polignac number, because 9912213 - 2¹ = 9912211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9912211) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 6070 + ... + 7527.

Almost surely, 2^9912213 is an apocalyptic number.

It is an amenable number.

9912213 is a deficient number, since it is larger than the sum of its proper divisors (4950401).

9912213 is an equidigital number, since it uses as much as digits as its factorization.

9912213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13615 (or 13600 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 9912213 is about 3148.3667194277. The cubic root of 9912213 is about 214.8111772842.

The spelling of 9912213 in words is "nine million, nine hundred twelve thousand, two hundred thirteen".