42039983 has 4 divisors (see below), whose sum is σ = 42106008. Its totient is φ = 41973960.

The previous prime is 42039967. The next prime is 42040007. The reversal of 42039983 is 38993024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42039983 - 2⁴ = 42039967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42039953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32048 + ... + 33333.

It is an arithmetic number, because the mean of its divisors is an integer number (10526502).

Almost surely, 2^42039983 is an apocalyptic number.

42039983 is a deficient number, since it is larger than the sum of its proper divisors (66025).

42039983 is an equidigital number, since it uses as much as digits as its factorization.

42039983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66024.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 42039983 is about 6483.8247200244. The cubic root of 42039983 is about 347.7129326586.

The spelling of 42039983 in words is "forty-two million, thirty-nine thousand, nine hundred eighty-three".