39040049 has 2 divisors, whose sum is σ = 39040050. Its totient is φ = 39040048.

The previous prime is 39040037. The next prime is 39040051. The reversal of 39040049 is 94004093.

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., 38688400 + 351649 = 6220^2 + 593^2 .

It is an emirp because it is prime and its reverse (94004093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39040049 - 2¹⁶ = 38974513 is a prime.

Together with 39040051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39042049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19520024 + 19520025.

It is an arithmetic number, because the mean of its divisors is an integer number (19520025).

Almost surely, 2^39040049 is an apocalyptic number.

It is an amenable number.

39040049 is a deficient number, since it is larger than the sum of its proper divisors (1).

39040049 is an equidigital number, since it uses as much as digits as its factorization.

39040049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 39040049 is about 6248.2036618535. The cubic root of 39040049 is about 339.2371854675.

The spelling of 39040049 in words is "thirty-nine million, forty thousand, forty-nine".