1006005603 has 32 divisors (see below), whose sum is σ = 1392422400. Its totient is φ = 645765120.

The previous prime is 1006005587. The next prime is 1006005619. The reversal of 1006005603 is 3065006001.

It is an interprime number because it is at equal distance from previous prime (1006005587) and next prime (1006005619).

It is not a de Polignac number, because 1006005603 - 2⁴ = 1006005587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1006005603.

It is not an unprimeable number, because it can be changed into a prime (1006000603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2240323 + ... + 2240771.

It is an arithmetic number, because the mean of its divisors is an integer number (43513200).

Almost surely, 2^1006005603 is an apocalyptic number.

1006005603 is a deficient number, since it is larger than the sum of its proper divisors (386416797).

1006005603 is a wasteful number, since it uses less digits than its factorization.

1006005603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1006005603 is about 31717.5913808095. The cubic root of 1006005603 is about 1001.9978735099.

The spelling of 1006005603 in words is "one billion, six million, five thousand, six hundred three".