1223543996 has 12 divisors (see below), whose sum is σ = 2143400448. Its totient is φ = 611143872.

The previous prime is 1223543983. The next prime is 1223544001. The reversal of 1223543996 is 6993453221.

It is a super-4 number, since 4×1223543996⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

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, 152636 + ... + 160451.

It is an arithmetic number, because the mean of its divisors is an integer number (178616704).

Almost surely, 2^1223543996 is an apocalyptic number.

It is an amenable number.

1223543996 is a deficient number, since it is larger than the sum of its proper divisors (919856452).

1223543996 is a wasteful number, since it uses less digits than its factorization.

1223543996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314068 (or 314066 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 1223543996 is about 34979.1937585760. The cubic root of 1223543996 is about 1069.5633924865.

The spelling of 1223543996 in words is "one billion, two hundred twenty-three million, five hundred forty-three thousand, nine hundred ninety-six".