1229390817 has 8 divisors (see below), whose sum is σ = 1639487520. Its totient is φ = 819444000.

The previous prime is 1229390807. The next prime is 1229390821. The reversal of 1229390817 is 7180939221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1229390817 - 2⁷ = 1229390689 is a prime.

It is a super-2 number, since 2×1229390817² = 3022803561847854978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1229390807) 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 in 7 ways as a sum of consecutive naturals, for example, 16684 + ... + 52317.

It is an arithmetic number, because the mean of its divisors is an integer number (204935940).

Almost surely, 2^1229390817 is an apocalyptic number.

It is an amenable number.

1229390817 is a deficient number, since it is larger than the sum of its proper divisors (410096703).

1229390817 is an equidigital number, since it uses as much as digits as its factorization.

1229390817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74943.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1229390817 is about 35062.6698498560. The cubic root of 1229390817 is about 1071.2643559803.

It can be divided in two parts, 122 and 9390817, that added together give a palindrome (9390939).

The spelling of 1229390817 in words is "one billion, two hundred twenty-nine million, three hundred ninety thousand, eight hundred seventeen".