1226987329 has 2 divisors, whose sum is σ = 1226987330. Its totient is φ = 1226987328.

The previous prime is 1226987287. The next prime is 1226987351. The reversal of 1226987329 is 9237896221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119906225 + 107081104 = 33465^2 + 10348^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226987329 - 2²³ = 1218598721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226987369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613493664 + 613493665.

It is an arithmetic number, because the mean of its divisors is an integer number (613493665).

Almost surely, 2^1226987329 is an apocalyptic number.

It is an amenable number.

1226987329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226987329 is an equidigital number, since it uses as much as digits as its factorization.

1226987329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 1226987329 is about 35028.3789091074. The cubic root of 1226987329 is about 1070.5657848597.

The spelling of 1226987329 in words is "one billion, two hundred twenty-six million, nine hundred eighty-seven thousand, three hundred twenty-nine".