1003123001 has 2 divisors, whose sum is σ = 1003123002. Its totient is φ = 1003123000.

The previous prime is 1003122983. The next prime is 1003123007. The reversal of 1003123001 is 1003213001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504047401 + 499075600 = 22451^2 + 22340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003123001 - 2²⁶ = 936014137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1003123007) 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 as a sum of consecutive naturals, namely, 501561500 + 501561501.

It is an arithmetic number, because the mean of its divisors is an integer number (501561501).

Almost surely, 2^1003123001 is an apocalyptic number.

It is an amenable number.

1003123001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003123001 is an equidigital number, since it uses as much as digits as its factorization.

1003123001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1003123001 is about 31672.1170905893. The cubic root of 1003123001 is about 1001.0399185279.

Adding to 1003123001 its reverse (1003213001), we get a palindrome (2006336002).

Subtracting 1003123001 from its reverse (1003213001), we obtain a square (90000 = 300²).

The spelling of 1003123001 in words is "one billion, three million, one hundred twenty-three thousand, one".