39842213 has 2 divisors, whose sum is σ = 39842214. Its totient is φ = 39842212.

The previous prime is 39842207. The next prime is 39842219. The reversal of 39842213 is 31224893.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (39842207) and next prime (39842219).

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 315844 = 6287^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 39842213 - 2⁴ = 39842197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39842213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39842219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19921106 + 19921107.

It is an arithmetic number, because the mean of its divisors is an integer number (19921107).

Almost surely, 2^39842213 is an apocalyptic number.

It is an amenable number.

39842213 is a deficient number, since it is larger than the sum of its proper divisors (1).

39842213 is an equidigital number, since it uses as much as digits as its factorization.

39842213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 39842213 is about 6312.0688367603. The cubic root of 39842213 is about 341.5449101224.

The spelling of 39842213 in words is "thirty-nine million, eight hundred forty-two thousand, two hundred thirteen".