1000203013 has 4 divisors (see below), whose sum is σ = 1000538208. Its totient is φ = 999867820.

The previous prime is 1000202993. The next prime is 1000203049. The reversal of 1000203013 is 3103020001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000203013 - 2⁹ = 1000202501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000203053) 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, 163081 + ... + 169102.

It is an arithmetic number, because the mean of its divisors is an integer number (250134552).

Almost surely, 2^1000203013 is an apocalyptic number.

It is an amenable number.

1000203013 is a deficient number, since it is larger than the sum of its proper divisors (335195).

1000203013 is an equidigital number, since it uses as much as digits as its factorization.

1000203013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335194.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1000203013 is about 31625.9863561597. The cubic root of 1000203013 is about 1000.0676664212.

Adding to 1000203013 its reverse (3103020001), we get a palindrome (4103223014).

The spelling of 1000203013 in words is "one billion, two hundred three thousand, thirteen".