13500005 has 8 divisors (see below), whose sum is σ = 16638072. Its totient is φ = 10507968.

The previous prime is 13499999. The next prime is 13500007. The reversal of 13500005 is 50000531.

It can be written as a sum of positive squares in 4 ways, for example, as 2989441 + 10510564 = 1729^2 + 3242^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13500005 - 2¹⁴ = 13483621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 36302 + ... + 36671.

It is an arithmetic number, because the mean of its divisors is an integer number (2079759).

Almost surely, 2^13500005 is an apocalyptic number.

It is an amenable number.

13500005 is a deficient number, since it is larger than the sum of its proper divisors (3138067).

13500005 is an equidigital number, since it uses as much as digits as its factorization.

13500005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73015.

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 13500005 is about 3674.2352945885. The cubic root of 13500005 is about 238.1101871915.

Adding to 13500005 its reverse (50000531), we get a palindrome (63500536).

The spelling of 13500005 in words is "thirteen million, five hundred thousand, five".