1663232923 has 4 divisors (see below), whose sum is σ = 1814435928. Its totient is φ = 1512029920.

The previous prime is 1663232903. The next prime is 1663232939. The reversal of 1663232923 is 3292323661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1663232923 - 2⁹ = 1663232411 is a prime.

It is a super-2 number, since 2×1663232923² = 5532687512302247858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663232903) 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, 75601486 + ... + 75601507.

It is an arithmetic number, because the mean of its divisors is an integer number (453608982).

Almost surely, 2^1663232923 is an apocalyptic number.

1663232923 is a deficient number, since it is larger than the sum of its proper divisors (151203005).

1663232923 is a wasteful number, since it uses less digits than its factorization.

1663232923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151203004.

The product of its digits is 69984, while the sum is 37.

The square root of 1663232923 is about 40782.7527638829. The cubic root of 1663232923 is about 1184.8163110268.

The spelling of 1663232923 in words is "one billion, six hundred sixty-three million, two hundred thirty-two thousand, nine hundred twenty-three".