3942008491 has 4 divisors (see below), whose sum is σ = 3942395712. Its totient is φ = 3941621272.

The previous prime is 3942008459. The next prime is 3942008549. The reversal of 3942008491 is 1948002493.

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 3942008491 - 2⁵ = 3942008459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3942006491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177916 + ... + 198841.

It is an arithmetic number, because the mean of its divisors is an integer number (985598928).

Almost surely, 2^3942008491 is an apocalyptic number.

3942008491 is a deficient number, since it is larger than the sum of its proper divisors (387221).

3942008491 is a wasteful number, since it uses less digits than its factorization.

3942008491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387220.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 3942008491 is about 62785.4162286116. The cubic root of 3942008491 is about 1579.6923626598.

The spelling of 3942008491 in words is "three billion, nine hundred forty-two million, eight thousand, four hundred ninety-one".