1002003043 has 4 divisors (see below), whose sum is σ = 1002734208. Its totient is φ = 1001271880.

The previous prime is 1002002993. The next prime is 1002003047. The reversal of 1002003043 is 3403002001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3403002001 = 7 ⋅486143143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002003043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002003047) 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, 363523 + ... + 366268.

It is an arithmetic number, because the mean of its divisors is an integer number (250683552).

Almost surely, 2^1002003043 is an apocalyptic number.

1002003043 is a deficient number, since it is larger than the sum of its proper divisors (731165).

1002003043 is an equidigital number, since it uses as much as digits as its factorization.

1002003043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731164.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1002003043 is about 31654.4316486649. The cubic root of 1002003043 is about 1000.6672356975.

Adding to 1002003043 its reverse (3403002001), we get a palindrome (4405005044).

The spelling of 1002003043 in words is "one billion, two million, three thousand, forty-three".