39942417 has 4 divisors (see below), whose sum is σ = 53256560. Its totient is φ = 26628276.

The previous prime is 39942379. The next prime is 39942439. The reversal of 39942417 is 71424993.

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.

It is not a de Polignac number, because 39942417 - 2²² = 35748113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39942457) 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, 6657067 + ... + 6657072.

It is an arithmetic number, because the mean of its divisors is an integer number (13314140).

Almost surely, 2^39942417 is an apocalyptic number.

It is an amenable number.

39942417 is a deficient number, since it is larger than the sum of its proper divisors (13314143).

39942417 is a wasteful number, since it uses less digits than its factorization.

39942417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13314142.

The product of its digits is 54432, while the sum is 39.

The square root of 39942417 is about 6320.0013449366. The cubic root of 39942417 is about 341.8310012815.

The spelling of 39942417 in words is "thirty-nine million, nine hundred forty-two thousand, four hundred seventeen".