39934243 has 2 divisors, whose sum is σ = 39934244. Its totient is φ = 39934242.

The previous prime is 39934201. The next prime is 39934249. The reversal of 39934243 is 34243993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39934243 - 2²¹ = 37837091 is a prime.

It is not a weakly prime, because it can be changed into another prime (39934249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19967121 + 19967122.

It is an arithmetic number, because the mean of its divisors is an integer number (19967122).

Almost surely, 2^39934243 is an apocalyptic number.

39934243 is a deficient number, since it is larger than the sum of its proper divisors (1).

39934243 is an equidigital number, since it uses as much as digits as its factorization.

39934243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 39934243 is about 6319.3546347709. The cubic root of 39934243 is about 341.8076817344.

The spelling of 39934243 in words is "thirty-nine million, nine hundred thirty-four thousand, two hundred forty-three".