39949207 has 2 divisors, whose sum is σ = 39949208. Its totient is φ = 39949206.

The previous prime is 39949187. The next prime is 39949213. The reversal of 39949207 is 70294993.

39949207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39949207 - 2¹⁵ = 39916439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39949277) 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, 19974603 + 19974604.

It is an arithmetic number, because the mean of its divisors is an integer number (19974604).

Almost surely, 2^39949207 is an apocalyptic number.

39949207 is a deficient number, since it is larger than the sum of its proper divisors (1).

39949207 is an equidigital number, since it uses as much as digits as its factorization.

39949207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 39949207 is about 6320.5385055389. The cubic root of 39949207 is about 341.8503700059.

The spelling of 39949207 in words is "thirty-nine million, nine hundred forty-nine thousand, two hundred seven".