16900321 has 3 divisors (see below), whose sum is σ = 16904433. Its totient is φ = 16896210.

The previous prime is 16900309. The next prime is 16900337. The reversal of 16900321 is 12300961.

The square root of 16900321 is 4111.

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.

It is not a de Polignac number, because 16900321 - 2¹⁹ = 16376033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16900292 and 16900301.

It is not an unprimeable number, because it can be changed into a prime (16900021) 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, 2056 + ... + 6166.

It is an arithmetic number, because the mean of its divisors is an integer number (5634811).

Almost surely, 2^16900321 is an apocalyptic number.

16900321 is the 4111-st square number.

16900321 is the 2056-th centered octagonal number.

It is an amenable number.

16900321 is a deficient number, since it is larger than the sum of its proper divisors (4112).

16900321 is an frugal number, since it uses more digits than its factorization.

16900321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8222 (or 4111 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The cubic root of 16900321 is about 256.6246191498.

Multiplying 16900321 by its product of nonzero digits (324), we get a square (5475704004 = 73998²).

The spelling of 16900321 in words is "sixteen million, nine hundred thousand, three hundred twenty-one".