13287969 has 24 divisors (see below), whose sum is σ = 20092800. Its totient is φ = 8775216.

The previous prime is 13287949. The next prime is 13287991. The reversal of 13287969 is 96978231.

It is not a de Polignac number, because 13287969 - 2¹⁵ = 13255201 is a prime.

It is a super-2 number, since 2×13287969² = 353140240289922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13287949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36024 + ... + 36390.

It is an arithmetic number, because the mean of its divisors is an integer number (837200).

Almost surely, 2^13287969 is an apocalyptic number.

It is an amenable number.

13287969 is a deficient number, since it is larger than the sum of its proper divisors (6804831).

13287969 is an equidigital number, since it uses as much as digits as its factorization.

13287969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 519 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 13287969 is about 3645.2666569128. The cubic root of 13287969 is about 236.8569879069.

The spelling of 13287969 in words is "thirteen million, two hundred eighty-seven thousand, nine hundred sixty-nine".