1228604917 has 2 divisors, whose sum is σ = 1228604918. Its totient is φ = 1228604916.

The previous prime is 1228604891. The next prime is 1228604921. The reversal of 1228604917 is 7194068221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223180676 + 5424241 = 34974^2 + 2329^2 .

It is an emirp because it is prime and its reverse (7194068221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228604917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1228604917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228604947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614302458 + 614302459.

It is an arithmetic number, because the mean of its divisors is an integer number (614302459).

Almost surely, 2^1228604917 is an apocalyptic number.

It is an amenable number.

1228604917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228604917 is an equidigital number, since it uses as much as digits as its factorization.

1228604917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1228604917 is about 35051.4609823899. The cubic root of 1228604917 is about 1071.0360352791.

The spelling of 1228604917 in words is "one billion, two hundred twenty-eight million, six hundred four thousand, nine hundred seventeen".