13709537 has 4 divisors (see below), whose sum is σ = 13738176. Its totient is φ = 13680900.

The previous prime is 13709513. The next prime is 13709551. The reversal of 13709537 is 73590731.

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: 73590731 = 23 ⋅3199597.

It is a cyclic number.

It is not a de Polignac number, because 13709537 - 2¹⁸ = 13447393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13709497 and 13709506.

It is not an unprimeable number, because it can be changed into a prime (13709557) 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, 13589 + ... + 14562.

It is an arithmetic number, because the mean of its divisors is an integer number (3434544).

Almost surely, 2^13709537 is an apocalyptic number.

It is an amenable number.

13709537 is a deficient number, since it is larger than the sum of its proper divisors (28639).

13709537 is an equidigital number, since it uses as much as digits as its factorization.

13709537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28638.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 13709537 is about 3702.6391938724. The cubic root of 13709537 is about 239.3357616901.

The spelling of 13709537 in words is "thirteen million, seven hundred nine thousand, five hundred thirty-seven".