12228613 has 2 divisors, whose sum is σ = 12228614. Its totient is φ = 12228612.

The previous prime is 12228599. The next prime is 12228653. The reversal of 12228613 is 31682221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7219969 + 5008644 = 2687^2 + 2238^2 .

It is an emirp because it is prime and its reverse (31682221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12228613 - 2¹³ = 12220421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12228653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114306 + 6114307.

It is an arithmetic number, because the mean of its divisors is an integer number (6114307).

Almost surely, 2^12228613 is an apocalyptic number.

It is an amenable number.

12228613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228613 is an equidigital number, since it uses as much as digits as its factorization.

12228613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 12228613 is about 3496.9433795817. The cubic root of 12228613 is about 230.3875821677.

The spelling of 12228613 in words is "twelve million, two hundred twenty-eight thousand, six hundred thirteen".