13288997 has 4 divisors (see below), whose sum is σ = 13296300. Its totient is φ = 13281696.

The previous prime is 13288973. The next prime is 13289039. The reversal of 13288997 is 79988231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6482116 + 6806881 = 2546^2 + 2609^2 .

It is a cyclic number.

It is not a de Polignac number, because 13288997 - 2⁸ = 13288741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13288927) 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 3 ways as a sum of consecutive naturals, for example, 1523 + ... + 5375.

It is an arithmetic number, because the mean of its divisors is an integer number (3324075).

Almost surely, 2^13288997 is an apocalyptic number.

It is an amenable number.

13288997 is a deficient number, since it is larger than the sum of its proper divisors (7303).

13288997 is an equidigital number, since it uses as much as digits as its factorization.

13288997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7302.

The product of its digits is 217728, while the sum is 47.

The square root of 13288997 is about 3645.4076589594. The cubic root of 13288997 is about 236.8630957554.

The spelling of 13288997 in words is "thirteen million, two hundred eighty-eight thousand, nine hundred ninety-seven".