3138639941 has 4 divisors (see below), whose sum is σ = 3142101312. Its totient is φ = 3135178572.

The previous prime is 3138639899. The next prime is 3138639947. The reversal of 3138639941 is 1499368313.

3138639941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 3138639941 - 2²⁶ = 3071531077 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 (3138639947) 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, 1729325 + ... + 1731138.

It is an arithmetic number, because the mean of its divisors is an integer number (785525328).

Almost surely, 2^3138639941 is an apocalyptic number.

It is an amenable number.

3138639941 is a deficient number, since it is larger than the sum of its proper divisors (3461371).

3138639941 is an equidigital number, since it uses as much as digits as its factorization.

3138639941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461370.

The product of its digits is 419904, while the sum is 47.

The square root of 3138639941 is about 56023.5659432707. The cubic root of 3138639941 is about 1464.1328980266.

The spelling of 3138639941 in words is "three billion, one hundred thirty-eight million, six hundred thirty-nine thousand, nine hundred forty-one".