16409729 has 8 divisors (see below), whose sum is σ = 19072320. Its totient is φ = 13826736.

The previous prime is 16409719. The next prime is 16409753. The reversal of 16409729 is 92790461.

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

It is not a de Polignac number, because 16409729 - 2⁴ = 16409713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16409692 and 16409701.

It is not an unprimeable number, because it can be changed into a prime (16409719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19454 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (2384040).

Almost surely, 2^16409729 is an apocalyptic number.

It is an amenable number.

16409729 is a deficient number, since it is larger than the sum of its proper divisors (2662591).

16409729 is an equidigital number, since it uses as much as digits as its factorization.

16409729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39799.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 16409729 is about 4050.8923708240. The cubic root of 16409729 is about 254.1170487873.

The spelling of 16409729 in words is "sixteen million, four hundred nine thousand, seven hundred twenty-nine".