1223638169 has 16 divisors (see below), whose sum is σ = 1368213504. Its totient is φ = 1086696000.

The previous prime is 1223638159. The next prime is 1223638177. The reversal of 1223638169 is 9618363221.

It is not a de Polignac number, because 1223638169 - 2¹² = 1223634073 is a prime.

It is a super-2 number, since 2×1223638169² = 2994580737267345122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1223638109) 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 15 ways as a sum of consecutive naturals, for example, 60944 + ... + 78494.

It is an arithmetic number, because the mean of its divisors is an integer number (85513344).

Almost surely, 2^1223638169 is an apocalyptic number.

It is an amenable number.

1223638169 is a deficient number, since it is larger than the sum of its proper divisors (144575335).

1223638169 is a wasteful number, since it uses less digits than its factorization.

1223638169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17768.

The product of its digits is 93312, while the sum is 41.

The square root of 1223638169 is about 34980.5398614715. The cubic root of 1223638169 is about 1069.5908322870.

It can be divided in two parts, 12236 and 38169, that added together give a palindrome (50405).

The spelling of 1223638169 in words is "one billion, two hundred twenty-three million, six hundred thirty-eight thousand, one hundred sixty-nine".