13709557 has 2 divisors, whose sum is σ = 13709558. Its totient is φ = 13709556.

The previous prime is 13709551. The next prime is 13709569. The reversal of 13709557 is 75590731.

It is a happy number.

13709557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 3218436 = 3239^2 + 1794^2 .

It is an emirp because it is prime and its reverse (75590731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13709557 - 2¹¹ = 13707509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13709551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6854778 + 6854779.

It is an arithmetic number, because the mean of its divisors is an integer number (6854779).

Almost surely, 2^13709557 is an apocalyptic number.

It is an amenable number.

13709557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13709557 is an equidigital number, since it uses as much as digits as its factorization.

13709557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 13709557 is about 3702.6418946477. The cubic root of 13709557 is about 239.3358780741.

The spelling of 13709557 in words is "thirteen million, seven hundred nine thousand, five hundred fifty-seven".