1663243433 has 8 divisors (see below), whose sum is σ = 1804035240. Its totient is φ = 1527224320.

The previous prime is 1663243429. The next prime is 1663243447. The reversal of 1663243433 is 3343423661.

It can be written as a sum of positive squares in 4 ways, for example, as 292170649 + 1371072784 = 17093^2 + 37028^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1663243433 - 2² = 1663243429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663243393 and 1663243402.

It is not an unprimeable number, because it can be changed into a prime (1663243423) 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, 1192448 + ... + 1193841.

It is an arithmetic number, because the mean of its divisors is an integer number (225504405).

Almost surely, 2^1663243433 is an apocalyptic number.

It is an amenable number.

1663243433 is a deficient number, since it is larger than the sum of its proper divisors (140791807).

1663243433 is a wasteful number, since it uses less digits than its factorization.

1663243433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386347.

The product of its digits is 93312, while the sum is 35.

The square root of 1663243433 is about 40782.8816171687. The cubic root of 1663243433 is about 1184.8188066470.

The spelling of 1663243433 in words is "one billion, six hundred sixty-three million, two hundred forty-three thousand, four hundred thirty-three".