1003981243 has 4 divisors (see below), whose sum is σ = 1027329688. Its totient is φ = 980632800.

The previous prime is 1003981219. The next prime is 1003981289. The reversal of 1003981243 is 3421893001.

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

It is a cyclic number.

It is not a de Polignac number, because 1003981243 - 2¹³ = 1003973051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003981543) 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, 11674158 + ... + 11674243.

It is an arithmetic number, because the mean of its divisors is an integer number (256832422).

Almost surely, 2^1003981243 is an apocalyptic number.

1003981243 is a deficient number, since it is larger than the sum of its proper divisors (23348445).

1003981243 is an equidigital number, since it uses as much as digits as its factorization.

1003981243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23348444.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1003981243 is about 31685.6630512918. The cubic root of 1003981243 is about 1001.3253237410.

The spelling of 1003981243 in words is "one billion, three million, nine hundred eighty-one thousand, two hundred forty-three".