13117172 has 6 divisors (see below), whose sum is σ = 22955058. Its totient is φ = 6558584.

The previous prime is 13117147. The next prime is 13117177. The reversal of 13117172 is 27171131.

It can be written as a sum of positive squares in only one way, i.e., 9709456 + 3407716 = 3116^2 + 1846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13117177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1639643 + ... + 1639650.

It is an arithmetic number, because the mean of its divisors is an integer number (3825843).

Almost surely, 2^13117172 is an apocalyptic number.

It is an amenable number.

13117172 is a deficient number, since it is larger than the sum of its proper divisors (9837886).

13117172 is a wasteful number, since it uses less digits than its factorization.

13117172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279297 (or 3279295 counting only the distinct ones).

The product of its digits is 294, while the sum is 23.

The square root of 13117172 is about 3621.7636587718. The cubic root of 13117172 is about 235.8377943138.

The spelling of 13117172 in words is "thirteen million, one hundred seventeen thousand, one hundred seventy-two".