39949213 has 2 divisors, whose sum is σ = 39949214. Its totient is φ = 39949212.

The previous prime is 39949207. The next prime is 39949223. The reversal of 39949213 is 31294993.

39949213 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., 22867524 + 17081689 = 4782^2 + 4133^2 .

It is a cyclic number.

It is not a de Polignac number, because 39949213 - 2²⁵ = 6394781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39949223) 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, 19974606 + 19974607.

It is an arithmetic number, because the mean of its divisors is an integer number (19974607).

Almost surely, 2^39949213 is an apocalyptic number.

It is an amenable number.

39949213 is a deficient number, since it is larger than the sum of its proper divisors (1).

39949213 is an equidigital number, since it uses as much as digits as its factorization.

39949213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 40.

The square root of 39949213 is about 6320.5389801820. The cubic root of 39949213 is about 341.8503871201.

The spelling of 39949213 in words is "thirty-nine million, nine hundred forty-nine thousand, two hundred thirteen".