39440213 has 2 divisors, whose sum is σ = 39440214. Its totient is φ = 39440212.

The previous prime is 39440201. The next prime is 39440227. The reversal of 39440213 is 31204493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22972849 + 16467364 = 4793^2 + 4058^2 .

It is a cyclic number.

It is not a de Polignac number, because 39440213 - 2¹⁰ = 39439189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39440243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19720106 + 19720107.

It is an arithmetic number, because the mean of its divisors is an integer number (19720107).

Almost surely, 2^39440213 is an apocalyptic number.

It is an amenable number.

39440213 is a deficient number, since it is larger than the sum of its proper divisors (1).

39440213 is an equidigital number, since it uses as much as digits as its factorization.

39440213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 39440213 is about 6280.1443454749. The cubic root of 39440213 is about 340.3923181885.

The spelling of 39440213 in words is "thirty-nine million, four hundred forty thousand, two hundred thirteen".