13487877 has 20 divisors (see below), whose sum is σ = 21700140. Its totient is φ = 8299584.

The previous prime is 13487863. The next prime is 13487879. The reversal of 13487877 is 77878431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3048516 + 10439361 = 1746^2 + 3231^2 .

It is not a de Polignac number, because 13487877 - 2¹² = 13483781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5352 + ... + 7457.

It is an arithmetic number, because the mean of its divisors is an integer number (1085007).

Almost surely, 2^13487877 is an apocalyptic number.

It is an amenable number.

13487877 is a deficient number, since it is larger than the sum of its proper divisors (8212263).

13487877 is a wasteful number, since it uses less digits than its factorization.

13487877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12834 (or 12825 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 13487877 is about 3672.5845123019. The cubic root of 13487877 is about 238.0388621426.

The spelling of 13487877 in words is "thirteen million, four hundred eighty-seven thousand, eight hundred seventy-seven".