12220393 has 2 divisors, whose sum is σ = 12220394. Its totient is φ = 12220392.

The previous prime is 12220361. The next prime is 12220421. The reversal of 12220393 is 39302221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6985449 + 5234944 = 2643^2 + 2288^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220393 - 2⁵ = 12220361 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12220333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110196 + 6110197.

It is an arithmetic number, because the mean of its divisors is an integer number (6110197).

Almost surely, 2^12220393 is an apocalyptic number.

It is an amenable number.

12220393 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220393 is an equidigital number, since it uses as much as digits as its factorization.

12220393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 12220393 is about 3495.7678698678. The cubic root of 12220393 is about 230.3359488818.

The spelling of 12220393 in words is "twelve million, two hundred twenty thousand, three hundred ninety-three".