13561687 has 6 divisors (see below), whose sum is σ = 14313408. Its totient is φ = 12847572.

The previous prime is 13561679. The next prime is 13561711. The reversal of 13561687 is 78616531.

It is not a de Polignac number, because 13561687 - 2³ = 13561679 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 (13561607) 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 5 ways as a sum of consecutive naturals, for example, 18423 + ... + 19144.

It is an arithmetic number, because the mean of its divisors is an integer number (2385568).

Almost surely, 2^13561687 is an apocalyptic number.

13561687 is a deficient number, since it is larger than the sum of its proper divisors (751721).

13561687 is an equidigital number, since it uses as much as digits as its factorization.

13561687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37605 (or 37586 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 13561687 is about 3682.6195839375. The cubic root of 13561687 is about 238.4722808976.

It can be divided in two parts, 13 and 561687, that multiplied together give a triangular number (7301931 = T₃₈₂₁).

The spelling of 13561687 in words is "thirteen million, five hundred sixty-one thousand, six hundred eighty-seven".