1603342513 has 4 divisors (see below), whose sum is σ = 1603600240. Its totient is φ = 1603084788.

The previous prime is 1603342511. The next prime is 1603342567. The reversal of 1603342513 is 3152433061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3152433061 = 23 ⋅137062307.

It is a cyclic number.

It is not a de Polignac number, because 1603342513 - 2¹ = 1603342511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1603342511) 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, 119295 + ... + 132052.

It is an arithmetic number, because the mean of its divisors is an integer number (400900060).

Almost surely, 2^1603342513 is an apocalyptic number.

It is an amenable number.

1603342513 is a deficient number, since it is larger than the sum of its proper divisors (257727).

1603342513 is an equidigital number, since it uses as much as digits as its factorization.

1603342513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257726.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1603342513 is about 40041.7596141828. The cubic root of 1603342513 is about 1170.4209927268.

Adding to 1603342513 its reverse (3152433061), we get a palindrome (4755775574).

The spelling of 1603342513 in words is "one billion, six hundred three million, three hundred forty-two thousand, five hundred thirteen".