13870013 has 4 divisors (see below), whose sum is σ = 14208348. Its totient is φ = 13531680.

The previous prime is 13869991. The next prime is 13870039. The reversal of 13870013 is 31007831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31007831 = 131 ⋅236701.

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 12517444 = 1163^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 13870013 - 2⁶ = 13869949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13870313) 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, 169106 + ... + 169187.

It is an arithmetic number, because the mean of its divisors is an integer number (3552087).

Almost surely, 2^13870013 is an apocalyptic number.

It is an amenable number.

13870013 is a deficient number, since it is larger than the sum of its proper divisors (338335).

13870013 is an equidigital number, since it uses as much as digits as its factorization.

13870013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338334.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 13870013 is about 3724.2466352270. The cubic root of 13870013 is about 240.2659840450.

Adding to 13870013 its reverse (31007831), we get a palindrome (44877844).

The spelling of 13870013 in words is "thirteen million, eight hundred seventy thousand, thirteen".