13281969 has 16 divisors (see below), whose sum is σ = 19078400. Its totient is φ = 8192016.

The previous prime is 13281967. The next prime is 13281973. The reversal of 13281969 is 96918231.

13281969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13281969 - 2¹ = 13281967 is a prime.

It is a super-2 number, since 2×13281969² = 352821401033922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13281967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259 + ... + 5160.

It is an arithmetic number, because the mean of its divisors is an integer number (1192400).

Almost surely, 2^13281969 is an apocalyptic number.

13281969 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13281969 is a deficient number, since it is larger than the sum of its proper divisors (5796431).

13281969 is a wasteful number, since it uses less digits than its factorization.

13281969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484.

The product of its digits is 23328, while the sum is 39.

The square root of 13281969 is about 3644.4435789294. The cubic root of 13281969 is about 236.8213326993.

The spelling of 13281969 in words is "thirteen million, two hundred eighty-one thousand, nine hundred sixty-nine".