39944017 has 2 divisors, whose sum is σ = 39944018. Its totient is φ = 39944016.

The previous prime is 39943997. The next prime is 39944039. The reversal of 39944017 is 71044993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36469521 + 3474496 = 6039^2 + 1864^2 .

It is an emirp because it is prime and its reverse (71044993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39944017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39944057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972008 + 19972009.

It is an arithmetic number, because the mean of its divisors is an integer number (19972009).

Almost surely, 2^39944017 is an apocalyptic number.

It is an amenable number.

39944017 is a deficient number, since it is larger than the sum of its proper divisors (1).

39944017 is an equidigital number, since it uses as much as digits as its factorization.

39944017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 39944017 is about 6320.1279259205. The cubic root of 39944017 is about 341.8355655380.

The spelling of 39944017 in words is "thirty-nine million, nine hundred forty-four thousand, seventeen".