1227729069 has 48 divisors (see below), whose sum is σ = 2225478528. Its totient is φ = 660275712.

The previous prime is 1227729011. The next prime is 1227729073. The reversal of 1227729069 is 9609277221.

It is not a de Polignac number, because 1227729069 - 2⁸ = 1227728813 is a prime.

It is a super-2 number, since 2×1227729069² = 3014637333735213522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227729469) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7689 + ... + 50145.

It is an arithmetic number, because the mean of its divisors is an integer number (46364136).

Almost surely, 2^1227729069 is an apocalyptic number.

It is an amenable number.

1227729069 is a deficient number, since it is larger than the sum of its proper divisors (997749459).

1227729069 is an equidigital number, since it uses as much as digits as its factorization.

1227729069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42496 (or 42484 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 1227729069 is about 35038.9650103995. The cubic root of 1227729069 is about 1070.7814680178.

It can be divided in two parts, 122772 and 9069, that added together give a triangular number (131841 = T₅₁₃).

The spelling of 1227729069 in words is "one billion, two hundred twenty-seven million, seven hundred twenty-nine thousand, sixty-nine".