1603041403 has 4 divisors (see below), whose sum is σ = 1654752448. Its totient is φ = 1551330360.

The previous prime is 1603041379. The next prime is 1603041409. The reversal of 1603041403 is 3041403061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3041403061 = 853 ⋅3565537.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1603041403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1603041409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25855476 + ... + 25855537.

It is an arithmetic number, because the mean of its divisors is an integer number (413688112).

Almost surely, 2^1603041403 is an apocalyptic number.

1603041403 is a deficient number, since it is larger than the sum of its proper divisors (51711045).

1603041403 is an equidigital number, since it uses as much as digits as its factorization.

1603041403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51711044.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1603041403 is about 40037.9994879864. Note that the first 3 decimals coincide. The cubic root of 1603041403 is about 1170.3477192316.

Adding to 1603041403 its reverse (3041403061), we get a palindrome (4644444464).

The spelling of 1603041403 in words is "one billion, six hundred three million, forty-one thousand, four hundred three".