13487869 has 4 divisors (see below), whose sum is σ = 13852444. Its totient is φ = 13123296.

The previous prime is 13487863. The next prime is 13487879. The reversal of 13487869 is 96878431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10725625 + 2762244 = 3275^2 + 1662^2 .

It is a cyclic number.

It is not a de Polignac number, because 13487869 - 2¹¹ = 13485821 is a prime.

It is a super-2 number, since 2×13487869² = 363845220322322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182232 + ... + 182305.

It is an arithmetic number, because the mean of its divisors is an integer number (3463111).

Almost surely, 2^13487869 is an apocalyptic number.

It is an amenable number.

13487869 is a deficient number, since it is larger than the sum of its proper divisors (364575).

13487869 is an equidigital number, since it uses as much as digits as its factorization.

13487869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364574.

The product of its digits is 290304, while the sum is 46.

The square root of 13487869 is about 3672.5834231505. The cubic root of 13487869 is about 238.0388150803.

The spelling of 13487869 in words is "thirteen million, four hundred eighty-seven thousand, eight hundred sixty-nine".