1228713449 has 4 divisors (see below), whose sum is σ = 1228787280. Its totient is φ = 1228639620.

The previous prime is 1228713419. The next prime is 1228713457. The reversal of 1228713449 is 9443178221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1228713449 - 2⁸ = 1228713193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228713419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094 + ... + 49584.

It is an arithmetic number, because the mean of its divisors is an integer number (307196820).

Almost surely, 2^1228713449 is an apocalyptic number.

It is an amenable number.

1228713449 is a deficient number, since it is larger than the sum of its proper divisors (73831).

1228713449 is an equidigital number, since it uses as much as digits as its factorization.

1228713449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73830.

The product of its digits is 96768, while the sum is 41.

The square root of 1228713449 is about 35053.0091290320. The cubic root of 1228713449 is about 1071.0675719320.

The spelling of 1228713449 in words is "one billion, two hundred twenty-eight million, seven hundred thirteen thousand, four hundred forty-nine".