1603800243 has 12 divisors (see below), whose sum is σ = 2402400728. Its totient is φ = 1069200000.

The previous prime is 1603800229. The next prime is 1603800269. The reversal of 1603800243 is 3420083061.

It is a happy number.

It is not a de Polignac number, because 1603800243 - 2⁸ = 1603799987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1603802243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3299758 + ... + 3300243.

Almost surely, 2^1603800243 is an apocalyptic number.

1603800243 is a deficient number, since it is larger than the sum of its proper divisors (798600485).

1603800243 is an frugal number, since it uses more digits than its factorization.

1603800243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600016 (or 6600004 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1603800243 is about 40047.4748642158. The cubic root of 1603800243 is about 1170.5323612840.

The spelling of 1603800243 in words is "one billion, six hundred three million, eight hundred thousand, two hundred forty-three".