13423505 has 4 divisors (see below), whose sum is σ = 16108212. Its totient is φ = 10738800.

The previous prime is 13423499. The next prime is 13423511. The reversal of 13423505 is 50532431.

13423505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13423499) and next prime (13423511).

It can be written as a sum of positive squares in 2 ways, for example, as 3125824 + 10297681 = 1768^2 + 3209^2 .

It is not a de Polignac number, because 13423505 - 2¹⁰ = 13422481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342346 + ... + 1342355.

It is an arithmetic number, because the mean of its divisors is an integer number (4027053).

Almost surely, 2^13423505 is an apocalyptic number.

It is an amenable number.

13423505 is a deficient number, since it is larger than the sum of its proper divisors (2684707).

13423505 is an equidigital number, since it uses as much as digits as its factorization.

13423505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684706.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 13423505 is about 3663.8101752138. The cubic root of 13423505 is about 237.6595714335.

Adding to 13423505 its reverse (50532431), we get a palindrome (63955936).

The spelling of 13423505 in words is "thirteen million, four hundred twenty-three thousand, five hundred five".