13171623 has 4 divisors (see below), whose sum is σ = 17562168. Its totient is φ = 8781080.

The previous prime is 13171607. The next prime is 13171637. The reversal of 13171623 is 32617131.

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

It is a cyclic number.

It is not a de Polignac number, because 13171623 - 2⁴ = 13171607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13171593 and 13171602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13171603) 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, 2195268 + ... + 2195273.

It is an arithmetic number, because the mean of its divisors is an integer number (4390542).

Almost surely, 2^13171623 is an apocalyptic number.

13171623 is a deficient number, since it is larger than the sum of its proper divisors (4390545).

13171623 is an equidigital number, since it uses as much as digits as its factorization.

13171623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390544.

The product of its digits is 756, while the sum is 24.

The square root of 13171623 is about 3629.2730677093. The cubic root of 13171623 is about 236.1636744038.

Adding to 13171623 its reverse (32617131), we get a palindrome (45788754).

The spelling of 13171623 in words is "thirteen million, one hundred seventy-one thousand, six hundred twenty-three".