16216729 has 3 divisors (see below), whose sum is σ = 16220757. Its totient is φ = 16212702.

The previous prime is 16216723. The next prime is 16216741. The reversal of 16216729 is 92761261.

The square root of 16216729 is 4027.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92761261 = 233 ⋅398117.

It is not a de Polignac number, because 16216729 - 2¹⁵ = 16183961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16216694 and 16216703.

It is not an unprimeable number, because it can be changed into a prime (16216723) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2014 + ... + 6040.

It is an arithmetic number, because the mean of its divisors is an integer number (5406919).

Almost surely, 2^16216729 is an apocalyptic number.

16216729 is the 4027-th square number.

16216729 is the 2014-th centered octagonal number.

It is an amenable number.

16216729 is a deficient number, since it is larger than the sum of its proper divisors (4028).

16216729 is an frugal number, since it uses more digits than its factorization.

16216729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054 (or 4027 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The cubic root of 16216729 is about 253.1168670658.

The spelling of 16216729 in words is "sixteen million, two hundred sixteen thousand, seven hundred twenty-nine".