16273721 has 2 divisors, whose sum is σ = 16273722. Its totient is φ = 16273720.

The previous prime is 16273717. The next prime is 16273753. The reversal of 16273721 is 12737261.

16273721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 3024121 = 3640^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 16273721 - 2² = 16273717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16273711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8136860 + 8136861.

It is an arithmetic number, because the mean of its divisors is an integer number (8136861).

Almost surely, 2^16273721 is an apocalyptic number.

It is an amenable number.

16273721 is a deficient number, since it is larger than the sum of its proper divisors (1).

16273721 is an equidigital number, since it uses as much as digits as its factorization.

16273721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 29.

The square root of 16273721 is about 4034.0700291393. The cubic root of 16273721 is about 253.4130379783.

The spelling of 16273721 in words is "sixteen million, two hundred seventy-three thousand, seven hundred twenty-one".