16073621 has 2 divisors, whose sum is σ = 16073622. Its totient is φ = 16073620.

The previous prime is 16073611. The next prime is 16073633. The reversal of 16073621 is 12637061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13608721 + 2464900 = 3689^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 16073621 - 2¹⁰ = 16072597 is a prime.

It is a super-2 number, since 2×16073621² = 516722584103282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16073611) 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 as a sum of consecutive naturals, namely, 8036810 + 8036811.

It is an arithmetic number, because the mean of its divisors is an integer number (8036811).

Almost surely, 2^16073621 is an apocalyptic number.

It is an amenable number.

16073621 is a deficient number, since it is larger than the sum of its proper divisors (1).

16073621 is an equidigital number, since it uses as much as digits as its factorization.

16073621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 16073621 is about 4009.1920632467. The cubic root of 16073621 is about 252.3701047404.

The spelling of 16073621 in words is "sixteen million, seventy-three thousand, six hundred twenty-one".