39942433 has 4 divisors (see below), whose sum is σ = 40792320. Its totient is φ = 39092548.

The previous prime is 39942379. The next prime is 39942439. The reversal of 39942433 is 33424993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33424993 = 7 ⋅4774999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39942433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39942392 and 39942401.

It is not an unprimeable number, because it can be changed into a prime (39942439) 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 in 3 ways as a sum of consecutive naturals, for example, 424873 + ... + 424966.

It is an arithmetic number, because the mean of its divisors is an integer number (10198080).

Almost surely, 2^39942433 is an apocalyptic number.

It is an amenable number.

39942433 is a deficient number, since it is larger than the sum of its proper divisors (849887).

39942433 is an equidigital number, since it uses as much as digits as its factorization.

39942433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849886.

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

The square root of 39942433 is about 6320.0026107590. The cubic root of 39942433 is about 341.8310469247.

The spelling of 39942433 in words is "thirty-nine million, nine hundred forty-two thousand, four hundred thirty-three".