13708729 has 2 divisors, whose sum is σ = 13708730. Its totient is φ = 13708728.

The previous prime is 13708703. The next prime is 13708741. The reversal of 13708729 is 92780731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12616704 + 1092025 = 3552^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 13708729 - 2⁹ = 13708217 is a prime.

It is a Chen prime.

It is equal to p₈₉₂₃₇₈ and since 13708729 and 892378 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13708129) 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 as a sum of consecutive naturals, namely, 6854364 + 6854365.

It is an arithmetic number, because the mean of its divisors is an integer number (6854365).

Almost surely, 2^13708729 is an apocalyptic number.

It is an amenable number.

13708729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13708729 is an equidigital number, since it uses as much as digits as its factorization.

13708729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 13708729 is about 3702.5300809041. The cubic root of 13708729 is about 239.3310596812.

The spelling of 13708729 in words is "thirteen million, seven hundred eight thousand, seven hundred twenty-nine".