1000203923 has 2 divisors, whose sum is σ = 1000203924. Its totient is φ = 1000203922.

The previous prime is 1000203901. The next prime is 1000203929. The reversal of 1000203923 is 3293020001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000203923 - 2⁶ = 1000203859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000203895 and 1000203904.

It is not a weakly prime, because it can be changed into another prime (1000203929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500101961 + 500101962.

It is an arithmetic number, because the mean of its divisors is an integer number (500101962).

Almost surely, 2^1000203923 is an apocalyptic number.

1000203923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000203923 is an equidigital number, since it uses as much as digits as its factorization.

1000203923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1000203923 is about 31626.0007430595. Note that the first 3 decimals coincide. The cubic root of 1000203923 is about 1000.0679697133.

Adding to 1000203923 its reverse (3293020001), we get a palindrome (4293223924).

The spelling of 1000203923 in words is "one billion, two hundred three thousand, nine hundred twenty-three".