13729069 has 4 divisors (see below), whose sum is σ = 13746460. Its totient is φ = 13711680.

The previous prime is 13729061. The next prime is 13729099. The reversal of 13729069 is 96092731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96092731 = 7 ⋅13727533.

It can be written as a sum of positive squares in 2 ways, for example, as 3572100 + 10156969 = 1890^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 13729069 - 2³ = 13729061 is a prime.

It is a super-2 number, since 2×13729069² = 376974671213522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13729061) 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, 7452 + ... + 9109.

It is an arithmetic number, because the mean of its divisors is an integer number (3436615).

Almost surely, 2^13729069 is an apocalyptic number.

It is an amenable number.

13729069 is a deficient number, since it is larger than the sum of its proper divisors (17391).

13729069 is an equidigital number, since it uses as much as digits as its factorization.

13729069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17390.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 13729069 is about 3705.2758331871. The cubic root of 13729069 is about 239.4493684402.

The spelling of 13729069 in words is "thirteen million, seven hundred twenty-nine thousand, sixty-nine".