39049649 has 2 divisors, whose sum is σ = 39049650. Its totient is φ = 39049648.

The previous prime is 39049613. The next prime is 39049651. The reversal of 39049649 is 94694093.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29899024 + 9150625 = 5468^2 + 3025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39049649 is a prime.

It is a Sophie Germain prime.

Together with 39049651, 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 (39049679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19524824 + 19524825.

It is an arithmetic number, because the mean of its divisors is an integer number (19524825).

Almost surely, 2^39049649 is an apocalyptic number.

It is an amenable number.

39049649 is a deficient number, since it is larger than the sum of its proper divisors (1).

39049649 is an equidigital number, since it uses as much as digits as its factorization.

39049649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 39049649 is about 6248.9718354302. The cubic root of 39049649 is about 339.2649894804.

The spelling of 39049649 in words is "thirty-nine million, forty-nine thousand, six hundred forty-nine".