39942471 has 8 divisors (see below), whose sum is σ = 53324784. Its totient is φ = 26594240.

The previous prime is 39942457. The next prime is 39942509. The reversal of 39942471 is 17424993.

39942471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39942471 - 2⁵ = 39942439 is a prime.

It is a super-3 number, since 3×39942471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39942451) 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 in 7 ways as a sum of consecutive naturals, for example, 5646 + ... + 10571.

It is an arithmetic number, because the mean of its divisors is an integer number (6665598).

Almost surely, 2^39942471 is an apocalyptic number.

39942471 is a deficient number, since it is larger than the sum of its proper divisors (13382313).

39942471 is a wasteful number, since it uses less digits than its factorization.

39942471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17041.

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

The square root of 39942471 is about 6320.0056170861. The cubic root of 39942471 is about 341.8311553272.

The spelling of 39942471 in words is "thirty-nine million, nine hundred forty-two thousand, four hundred seventy-one".