39943873 has 2 divisors, whose sum is σ = 39943874. Its totient is φ = 39943872.

The previous prime is 39943807. The next prime is 39943973. The reversal of 39943873 is 37834993.

39943873 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., 29073664 + 10870209 = 5392^2 + 3297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39943873 is a prime.

It is not a weakly prime, because it can be changed into another prime (39943573) 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, 19971936 + 19971937.

It is an arithmetic number, because the mean of its divisors is an integer number (19971937).

Almost surely, 2^39943873 is an apocalyptic number.

It is an amenable number.

39943873 is a deficient number, since it is larger than the sum of its proper divisors (1).

39943873 is an equidigital number, since it uses as much as digits as its factorization.

39943873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 39943873 is about 6320.1165337358. The cubic root of 39943873 is about 341.8351547599.

The spelling of 39943873 in words is "thirty-nine million, nine hundred forty-three thousand, eight hundred seventy-three".