13209955 has 16 divisors (see below), whose sum is σ = 17363808. Its totient is φ = 9568000.

The previous prime is 13209953. The next prime is 13209967. The reversal of 13209955 is 55990231.

It is a happy number.

It is not a de Polignac number, because 13209955 - 2¹ = 13209953 is a prime.

It is a super-2 number, since 2×13209955² = 349005822204050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13209955.

It is not an unprimeable number, because it can be changed into a prime (13209953) 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 in 15 ways as a sum of consecutive naturals, for example, 25095 + ... + 25615.

It is an arithmetic number, because the mean of its divisors is an integer number (1085238).

Almost surely, 2^13209955 is an apocalyptic number.

13209955 is a deficient number, since it is larger than the sum of its proper divisors (4153853).

13209955 is a wasteful number, since it uses less digits than its factorization.

13209955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 13209955 is about 3634.5501784953. The cubic root of 13209955 is about 236.3925466924.

The spelling of 13209955 in words is "thirteen million, two hundred nine thousand, nine hundred fifty-five".