13009603 has 4 divisors (see below), whose sum is σ = 13458240. Its totient is φ = 12560968.

The previous prime is 13009589. The next prime is 13009609. The reversal of 13009603 is 30690031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30690031 = 31 ⋅990001.

It is a cyclic number.

It is not a de Polignac number, because 13009603 - 2⁵ = 13009571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13009609) 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, 224275 + ... + 224332.

It is an arithmetic number, because the mean of its divisors is an integer number (3364560).

Almost surely, 2^13009603 is an apocalyptic number.

13009603 is a deficient number, since it is larger than the sum of its proper divisors (448637).

13009603 is an equidigital number, since it uses as much as digits as its factorization.

13009603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448636.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 13009603 is about 3606.8827261224. The cubic root of 13009603 is about 235.1913516168.

Adding to 13009603 its reverse (30690031), we get a palindrome (43699634).

The spelling of 13009603 in words is "thirteen million, nine thousand, six hundred three".