13172727 has 4 divisors (see below), whose sum is σ = 17563640. Its totient is φ = 8781816.

The previous prime is 13172717. The next prime is 13172729. The reversal of 13172727 is 72727131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72727131 = 3 ⋅24242377.

It is not a de Polignac number, because 13172727 - 2¹¹ = 13170679 is a prime.

It is a Duffinian number.

13172727 is a modest number, since divided by 2727 gives 1317 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 13172694 and 13172703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172729) 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, 2195452 + ... + 2195457.

It is an arithmetic number, because the mean of its divisors is an integer number (4390910).

Almost surely, 2^13172727 is an apocalyptic number.

13172727 is a deficient number, since it is larger than the sum of its proper divisors (4390913).

13172727 is an equidigital number, since it uses as much as digits as its factorization.

13172727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390912.

The product of its digits is 4116, while the sum is 30.

The square root of 13172727 is about 3629.4251610965. The cubic root of 13172727 is about 236.1702723610.

Adding to 13172727 its reverse (72727131), we get a palindrome (85899858).

The spelling of 13172727 in words is "thirteen million, one hundred seventy-two thousand, seven hundred twenty-seven".