39994043 has 2 divisors, whose sum is σ = 39994044. Its totient is φ = 39994042.

The previous prime is 39994027. The next prime is 39994049. The reversal of 39994043 is 34049993.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34049993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39994043 - 2⁴ = 39994027 is a prime.

It is not a weakly prime, because it can be changed into another prime (39994049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19997021 + 19997022.

It is an arithmetic number, because the mean of its divisors is an integer number (19997022).

Almost surely, 2^39994043 is an apocalyptic number.

39994043 is a deficient number, since it is larger than the sum of its proper divisors (1).

39994043 is an equidigital number, since it uses as much as digits as its factorization.

39994043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 39994043 is about 6324.0843606011. The cubic root of 39994043 is about 341.9782112813.

The spelling of 39994043 in words is "thirty-nine million, nine hundred ninety-four thousand, forty-three".