1603532065 has 4 divisors (see below), whose sum is σ = 1924238484. Its totient is φ = 1282825648.

The previous prime is 1603532023. The next prime is 1603532081. The reversal of 1603532065 is 5602353061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5602353061 = 631 ⋅8878531.

It can be written as a sum of positive squares in 2 ways, for example, as 1095345216 + 508186849 = 33096^2 + 22543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603532065 - 2¹⁷ = 1603400993 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160353202 + ... + 160353211.

It is an arithmetic number, because the mean of its divisors is an integer number (481059621).

Almost surely, 2^1603532065 is an apocalyptic number.

It is an amenable number.

1603532065 is a deficient number, since it is larger than the sum of its proper divisors (320706419).

1603532065 is an equidigital number, since it uses as much as digits as its factorization.

1603532065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320706418.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 1603532065 is about 40044.1264731796. The cubic root of 1603532065 is about 1170.4671144789.

The spelling of 1603532065 in words is "one billion, six hundred three million, five hundred thirty-two thousand, sixty-five".