12213397 has 6 divisors (see below), whose sum is σ = 14207478. Its totient is φ = 10468584.

The previous prime is 12213353. The next prime is 12213401. The reversal of 12213397 is 79331221.

It can be written as a sum of positive squares in only one way, i.e., 8561476 + 3651921 = 2926^2 + 1911^2 .

It is not a de Polignac number, because 12213397 - 2⁷ = 12213269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124578 + ... + 124675.

It is an arithmetic number, because the mean of its divisors is an integer number (2367913).

Almost surely, 2^12213397 is an apocalyptic number.

It is an amenable number.

12213397 is a deficient number, since it is larger than the sum of its proper divisors (1994081).

12213397 is an equidigital number, since it uses as much as digits as its factorization.

12213397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249267 (or 249260 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 12213397 is about 3494.7670880904. The cubic root of 12213397 is about 230.2919858139.

The spelling of 12213397 in words is "twelve million, two hundred thirteen thousand, three hundred ninety-seven".