13690729 has 8 divisors (see below), whose sum is σ = 15611400. Its totient is φ = 11894016.

The previous prime is 13690723. The next prime is 13690739. The reversal of 13690729 is 92709631.

13690729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2096704 + 11594025 = 1448^2 + 3405^2 .

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

It is not a de Polignac number, because 13690729 - 2¹⁷ = 13559657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13690723) 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 in 7 ways as a sum of consecutive naturals, for example, 30754 + ... + 31195.

It is an arithmetic number, because the mean of its divisors is an integer number (1951425).

Almost surely, 2^13690729 is an apocalyptic number.

It is an amenable number.

13690729 is a deficient number, since it is larger than the sum of its proper divisors (1920671).

13690729 is a wasteful number, since it uses less digits than its factorization.

13690729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61979.

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

The square root of 13690729 is about 3700.0985122021. The cubic root of 13690729 is about 239.2262640203.

The spelling of 13690729 in words is "thirteen million, six hundred ninety thousand, seven hundred twenty-nine".