39090449 has 2 divisors, whose sum is σ = 39090450. Its totient is φ = 39090448.

The previous prime is 39090421. The next prime is 39090451. The reversal of 39090449 is 94409093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28430224 + 10660225 = 5332^2 + 3265^2 .

It is an emirp because it is prime and its reverse (94409093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39090449 - 2¹² = 39086353 is a prime.

It is a Sophie Germain prime.

Together with 39090451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39090419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19545224 + 19545225.

It is an arithmetic number, because the mean of its divisors is an integer number (19545225).

Almost surely, 2^39090449 is an apocalyptic number.

It is an amenable number.

39090449 is a deficient number, since it is larger than the sum of its proper divisors (1).

39090449 is an equidigital number, since it uses as much as digits as its factorization.

39090449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 39090449 is about 6252.2355201960. The cubic root of 39090449 is about 339.3831057239.

The spelling of 39090449 in words is "thirty-nine million, ninety thousand, four hundred forty-nine".