16441921 has 2 divisors, whose sum is σ = 16441922. Its totient is φ = 16441920.

The previous prime is 16441913. The next prime is 16441939. The reversal of 16441921 is 12914461.

16441921 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., 11128896 + 5313025 = 3336^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 16441921 - 2³ = 16441913 is a prime.

It is a super-3 number, since 3×16441921³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16441921.

It is not a weakly prime, because it can be changed into another prime (16441961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220960 + 8220961.

It is an arithmetic number, because the mean of its divisors is an integer number (8220961).

Almost surely, 2^16441921 is an apocalyptic number.

It is an amenable number.

16441921 is a deficient number, since it is larger than the sum of its proper divisors (1).

16441921 is an equidigital number, since it uses as much as digits as its factorization.

16441921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 16441921 is about 4054.8638694782. The cubic root of 16441921 is about 254.2831127207.

The spelling of 16441921 in words is "sixteen million, four hundred forty-one thousand, nine hundred twenty-one".