13729389 has 8 divisors (see below), whose sum is σ = 18376512. Its totient is φ = 9117600.

The previous prime is 13729369. The next prime is 13729399. The reversal of 13729389 is 98392731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13729389 - 2⁵ = 13729357 is a prime.

It is a super-2 number, since 2×13729389² = 376992244626642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13729389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13729349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7912 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (2297064).

Almost surely, 2^13729389 is an apocalyptic number.

It is an amenable number.

13729389 is a deficient number, since it is larger than the sum of its proper divisors (4647123).

13729389 is a wasteful number, since it uses less digits than its factorization.

13729389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17667.

The product of its digits is 81648, while the sum is 42.

The square root of 13729389 is about 3705.3190146059. The cubic root of 13729389 is about 239.4512288043.

The spelling of 13729389 in words is "thirteen million, seven hundred twenty-nine thousand, three hundred eighty-nine".