13487797 has 4 divisors (see below), whose sum is σ = 13522860. Its totient is φ = 13452736.

The previous prime is 13487779. The next prime is 13487801. The reversal of 13487797 is 79778431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79778431 = 173 ⋅461147.

It can be written as a sum of positive squares in 2 ways, for example, as 1920996 + 11566801 = 1386^2 + 3401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13487797 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 (13487707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16948 + ... + 17725.

It is an arithmetic number, because the mean of its divisors is an integer number (3380715).

Almost surely, 2^13487797 is an apocalyptic number.

It is an amenable number.

13487797 is a deficient number, since it is larger than the sum of its proper divisors (35063).

13487797 is an equidigital number, since it uses as much as digits as its factorization.

13487797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35062.

The product of its digits is 296352, while the sum is 46.

The square root of 13487797 is about 3672.5736207733. The cubic root of 13487797 is about 238.0383915188.

The spelling of 13487797 in words is "thirteen million, four hundred eighty-seven thousand, seven hundred ninety-seven".