16944437 has 2 divisors, whose sum is σ = 16944438. Its totient is φ = 16944436.

The previous prime is 16944407. The next prime is 16944479. The reversal of 16944437 is 73444961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 872356 = 4009^2 + 934^2 .

It is an emirp because it is prime and its reverse (73444961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16944437 - 2¹⁴ = 16928053 is a prime.

It is a super-2 number, since 2×16944437² = 574227890493938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16944437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16944407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8472218 + 8472219.

It is an arithmetic number, because the mean of its divisors is an integer number (8472219).

Almost surely, 2^16944437 is an apocalyptic number.

It is an amenable number.

16944437 is a deficient number, since it is larger than the sum of its proper divisors (1).

16944437 is an equidigital number, since it uses as much as digits as its factorization.

16944437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 16944437 is about 4116.3621074925. The cubic root of 16944437 is about 256.8477197464.

The spelling of 16944437 in words is "sixteen million, nine hundred forty-four thousand, four hundred thirty-seven".