13172949 has 10 divisors (see below), whose sum is σ = 19678230. Its totient is φ = 8781912.

The previous prime is 13172927. The next prime is 13172953. The reversal of 13172949 is 94927131.

It can be written as a sum of positive squares in only one way, i.e., 12830724 + 342225 = 3582^2 + 585^2 .

It is not a de Polignac number, because 13172949 - 2¹² = 13168853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172959) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 81234 + ... + 81395.

It is an arithmetic number, because the mean of its divisors is an integer number (1967823).

Almost surely, 2^13172949 is an apocalyptic number.

It is an amenable number.

13172949 is a deficient number, since it is larger than the sum of its proper divisors (6505281).

13172949 is an equidigital number, since it uses as much as digits as its factorization.

13172949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162641 (or 162632 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 13172949 is about 3629.4557443231. The cubic root of 13172949 is about 236.1715990796.

The spelling of 13172949 in words is "thirteen million, one hundred seventy-two thousand, nine hundred forty-nine".