39944189 has 2 divisors, whose sum is σ = 39944190. Its totient is φ = 39944188.

The previous prime is 39944173. The next prime is 39944207. The reversal of 39944189 is 98144993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34421689 + 5522500 = 5867^2 + 2350^2 .

It is an emirp because it is prime and its reverse (98144993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39944189 - 2⁴ = 39944173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39944159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972094 + 19972095.

It is an arithmetic number, because the mean of its divisors is an integer number (19972095).

Almost surely, 2^39944189 is an apocalyptic number.

It is an amenable number.

39944189 is a deficient number, since it is larger than the sum of its proper divisors (1).

39944189 is an equidigital number, since it uses as much as digits as its factorization.

39944189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 39944189 is about 6320.1415332253. The cubic root of 39944189 is about 341.8360561883.

The spelling of 39944189 in words is "thirty-nine million, nine hundred forty-four thousand, one hundred eighty-nine".