3920139443 has 4 divisors (see below), whose sum is σ = 4276515768. Its totient is φ = 3563763120.

The previous prime is 3920139383. The next prime is 3920139469. The reversal of 3920139443 is 3449310293.

It is a happy number.

3920139443 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.

It is a cyclic number.

It is not a de Polignac number, because 3920139443 - 2⁸ = 3920139187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3920139397 and 3920139406.

It is not an unprimeable number, because it can be changed into a prime (3920139043) 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, 178188146 + ... + 178188167.

It is an arithmetic number, because the mean of its divisors is an integer number (1069128942).

Almost surely, 2^3920139443 is an apocalyptic number.

3920139443 is a deficient number, since it is larger than the sum of its proper divisors (356376325).

3920139443 is a wasteful number, since it uses less digits than its factorization.

3920139443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356376324.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 3920139443 is about 62611.0169459018. The cubic root of 3920139443 is about 1576.7657285164.

The spelling of 3920139443 in words is "three billion, nine hundred twenty million, one hundred thirty-nine thousand, four hundred forty-three".