1331002003 has 4 divisors (see below), whose sum is σ = 1401054760. Its totient is φ = 1260949248.

The previous prime is 1331001953. The next prime is 1331002021. The reversal of 1331002003 is 3002001331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331002003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331002093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35026350 + ... + 35026387.

It is an arithmetic number, because the mean of its divisors is an integer number (350263690).

Almost surely, 2^1331002003 is an apocalyptic number.

1331002003 is a deficient number, since it is larger than the sum of its proper divisors (70052757).

1331002003 is an equidigital number, since it uses as much as digits as its factorization.

1331002003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70052756.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1331002003 is about 36482.9001451365. The cubic root of 1331002003 is about 1100.0005517904. Note that the first 3 decimals are identical.

Adding to 1331002003 its reverse (3002001331), we get a palindrome (4333003334).

The spelling of 1331002003 in words is "one billion, three hundred thirty-one million, two thousand, three".