1103001003 has 16 divisors (see below), whose sum is σ = 1759774240. Its totient is φ = 678769632.

The previous prime is 1103000999. The next prime is 1103001007. The reversal of 1103001003 is 3001003011.

It is an interprime number because it is at equal distance from previous prime (1103000999) and next prime (1103001007).

It is not a de Polignac number, because 1103001003 - 2² = 1103000999 is a prime.

It is a super-3 number, since 3×1103001003³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103001007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1570876 + ... + 1571577.

It is an arithmetic number, because the mean of its divisors is an integer number (109985890).

Almost surely, 2^1103001003 is an apocalyptic number.

1103001003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1103001003 is a deficient number, since it is larger than the sum of its proper divisors (656773237).

1103001003 is a wasteful number, since it uses less digits than its factorization.

1103001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142475 (or 3142469 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 1103001003 is about 33211.4589110445. The cubic root of 1103001003 is about 1033.2180132725.

Adding to 1103001003 its reverse (3001003011), we get a palindrome (4104004014).

The spelling of 1103001003 in words is "one billion, one hundred three million, one thousand, three".