1228804169 has 2 divisors, whose sum is σ = 1228804170. Its totient is φ = 1228804168.

The previous prime is 1228804139. The next prime is 1228804189. The reversal of 1228804169 is 9614088221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224160144 + 4644025 = 34988^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228804169 - 2²⁰ = 1227755593 is a prime.

It is a super-2 number, since 2×1228804169² = 3019919371503561122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1228804139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614402084 + 614402085.

It is an arithmetic number, because the mean of its divisors is an integer number (614402085).

Almost surely, 2^1228804169 is an apocalyptic number.

It is an amenable number.

1228804169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228804169 is an equidigital number, since it uses as much as digits as its factorization.

1228804169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1228804169 is about 35054.3031452631. The cubic root of 1228804169 is about 1071.0939314435.

The spelling of 1228804169 in words is "one billion, two hundred twenty-eight million, eight hundred four thousand, one hundred sixty-nine".