1228669879 has 2 divisors, whose sum is σ = 1228669880. Its totient is φ = 1228669878.

The previous prime is 1228669859. The next prime is 1228669889. The reversal of 1228669879 is 9789668221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1228669879 - 2⁹ = 1228669367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228669859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614334939 + 614334940.

It is an arithmetic number, because the mean of its divisors is an integer number (614334940).

Almost surely, 2^1228669879 is an apocalyptic number.

1228669879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228669879 is an equidigital number, since it uses as much as digits as its factorization.

1228669879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 58.

The square root of 1228669879 is about 35052.3876362224. The cubic root of 1228669879 is about 1071.0549118156.

The spelling of 1228669879 in words is "one billion, two hundred twenty-eight million, six hundred sixty-nine thousand, eight hundred seventy-nine".