13709559 has 4 divisors (see below), whose sum is σ = 18279416. Its totient is φ = 9139704.

The previous prime is 13709557. The next prime is 13709569. The reversal of 13709559 is 95590731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95590731 = 3 ⋅31863577.

It is not a de Polignac number, because 13709559 - 2¹ = 13709557 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 (13709551) 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 3 ways as a sum of consecutive naturals, for example, 2284924 + ... + 2284929.

It is an arithmetic number, because the mean of its divisors is an integer number (4569854).

Almost surely, 2^13709559 is an apocalyptic number.

13709559 is a deficient number, since it is larger than the sum of its proper divisors (4569857).

13709559 is an equidigital number, since it uses as much as digits as its factorization.

13709559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569856.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 13709559 is about 3702.6421647251. The cubic root of 13709559 is about 239.3358897125.

The spelling of 13709559 in words is "thirteen million, seven hundred nine thousand, five hundred fifty-nine".