39490109 has 2 divisors, whose sum is σ = 39490110. Its totient is φ = 39490108.

The previous prime is 39490069. The next prime is 39490163. The reversal of 39490109 is 90109493.

39490109 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., 34987225 + 4502884 = 5915^2 + 2122^2 .

It is an emirp because it is prime and its reverse (90109493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39490109 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 (39990109) 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, 19745054 + 19745055.

It is an arithmetic number, because the mean of its divisors is an integer number (19745055).

Almost surely, 2^39490109 is an apocalyptic number.

It is an amenable number.

39490109 is a deficient number, since it is larger than the sum of its proper divisors (1).

39490109 is an equidigital number, since it uses as much as digits as its factorization.

39490109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 39490109 is about 6284.1156100123. The cubic root of 39490109 is about 340.5358016755.

The spelling of 39490109 in words is "thirty-nine million, four hundred ninety thousand, one hundred nine".