1227143969 has 2 divisors, whose sum is σ = 1227143970. Its totient is φ = 1227143968.

The previous prime is 1227143917. The next prime is 1227143989. The reversal of 1227143969 is 9693417221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1192804369 + 34339600 = 34537^2 + 5860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1227143969 is a prime.

It is a super-2 number, since 2×1227143969² = 3011764641306145922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1227143989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613571984 + 613571985.

It is an arithmetic number, because the mean of its divisors is an integer number (613571985).

Almost surely, 2^1227143969 is an apocalyptic number.

It is an amenable number.

1227143969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227143969 is an equidigital number, since it uses as much as digits as its factorization.

1227143969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 1227143969 is about 35030.6147391107. The cubic root of 1227143969 is about 1070.6113398776.

The spelling of 1227143969 in words is "one billion, two hundred twenty-seven million, one hundred forty-three thousand, nine hundred sixty-nine".