13709569 has 2 divisors, whose sum is σ = 13709570. Its totient is φ = 13709568.

The previous prime is 13709557. The next prime is 13709593. The reversal of 13709569 is 96590731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13593969 + 115600 = 3687^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 13709569 - 2⁹ = 13709057 is a prime.

It is a super-2 number, since 2×13709569² = 375904564331522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13700569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6854784 + 6854785.

It is an arithmetic number, because the mean of its divisors is an integer number (6854785).

Almost surely, 2^13709569 is an apocalyptic number.

It is an amenable number.

13709569 is a deficient number, since it is larger than the sum of its proper divisors (1).

13709569 is an equidigital number, since it uses as much as digits as its factorization.

13709569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 13709569 is about 3702.6435151119. The cubic root of 13709569 is about 239.3359479045.

The spelling of 13709569 in words is "thirteen million, seven hundred nine thousand, five hundred sixty-nine".