13500003 has 16 divisors (see below), whose sum is σ = 19714176. Its totient is φ = 8149440.

The previous prime is 13499999. The next prime is 13500007. The reversal of 13500003 is 30000531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13499999) and next prime (13500007).

It is not a de Polignac number, because 13500003 - 2² = 13499999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13500007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9676 + ... + 10982.

It is an arithmetic number, because the mean of its divisors is an integer number (1232136).

Almost surely, 2^13500003 is an apocalyptic number.

13500003 is a deficient number, since it is larger than the sum of its proper divisors (6214173).

13500003 is a wasteful number, since it uses less digits than its factorization.

13500003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634.

The product of its (nonzero) digits is 45, while the sum is 12.

The square root of 13500003 is about 3674.2350224230. The cubic root of 13500003 is about 238.1101754330.

Adding to 13500003 its reverse (30000531), we get a palindrome (43500534).

The spelling of 13500003 in words is "thirteen million, five hundred thousand, three".