13759561 has 4 divisors (see below), whose sum is σ = 13868032. Its totient is φ = 13651092.

The previous prime is 13759531. The next prime is 13759583. The reversal of 13759561 is 16595731.

13759561 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16595731 = 53 ⋅313127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13759561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13759561.

It is not an unprimeable number, because it can be changed into a prime (13759531) 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, 54045 + ... + 54298.

It is an arithmetic number, because the mean of its divisors is an integer number (3467008).

Almost surely, 2^13759561 is an apocalyptic number.

It is an amenable number.

13759561 is a deficient number, since it is larger than the sum of its proper divisors (108471).

13759561 is a wasteful number, since it uses less digits than its factorization.

13759561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108470.

The product of its digits is 28350, while the sum is 37.

The square root of 13759561 is about 3709.3882244920. The cubic root of 13759561 is about 239.6265081880.

The spelling of 13759561 in words is "thirteen million, seven hundred fifty-nine thousand, five hundred sixty-one".