1228618073 has 2 divisors, whose sum is σ = 1228618074. Its totient is φ = 1228618072.

The previous prime is 1228618057. The next prime is 1228618099. The reversal of 1228618073 is 3708168221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1099386649 + 129231424 = 33157^2 + 11368^2 .

It is an emirp because it is prime and its reverse (3708168221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228618073 - 2⁴ = 1228618057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228618003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614309036 + 614309037.

It is an arithmetic number, because the mean of its divisors is an integer number (614309037).

Almost surely, 2^1228618073 is an apocalyptic number.

It is an amenable number.

1228618073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228618073 is an equidigital number, since it uses as much as digits as its factorization.

1228618073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1228618073 is about 35051.6486488154. The cubic root of 1228618073 is about 1071.0398581787.

The spelling of 1228618073 in words is "one billion, two hundred twenty-eight million, six hundred eighteen thousand, seventy-three".