1603872943 has 4 divisors (see below), whose sum is σ = 1604560408. Its totient is φ = 1603185480.

The previous prime is 1603872923. The next prime is 1603872983. The reversal of 1603872943 is 3492783061.

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 1603872943 - 2⁵ = 1603872911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1603872943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603872913) 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, 340221 + ... + 344902.

It is an arithmetic number, because the mean of its divisors is an integer number (401140102).

Almost surely, 2^1603872943 is an apocalyptic number.

1603872943 is a deficient number, since it is larger than the sum of its proper divisors (687465).

1603872943 is an equidigital number, since it uses as much as digits as its factorization.

1603872943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687464.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 1603872943 is about 40048.3825266390. The cubic root of 1603872943 is about 1170.5500476963.

The spelling of 1603872943 in words is "one billion, six hundred three million, eight hundred seventy-two thousand, nine hundred forty-three".