1228748369 has 2 divisors, whose sum is σ = 1228748370. Its totient is φ = 1228748368.

The previous prime is 1228748359. The next prime is 1228748371. The reversal of 1228748369 is 9638478221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1213825600 + 14922769 = 34840^2 + 3863^2 .

It is an emirp because it is prime and its reverse (9638478221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228748369 - 2¹² = 1228744273 is a prime.

It is a super-2 number, since 2×1228748369² = 3019645108640320322, which contains 22 as substring.

Together with 1228748371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1228748359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614374184 + 614374185.

It is an arithmetic number, because the mean of its divisors is an integer number (614374185).

Almost surely, 2^1228748369 is an apocalyptic number.

It is an amenable number.

1228748369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228748369 is an equidigital number, since it uses as much as digits as its factorization.

1228748369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 1228748369 is about 35053.5072282361. The cubic root of 1228748369 is about 1071.0777184055.

The spelling of 1228748369 in words is "one billion, two hundred twenty-eight million, seven hundred forty-eight thousand, three hundred sixty-nine".