3937820939 has 4 divisors (see below), whose sum is σ = 4240730256. Its totient is φ = 3634911624.

The previous prime is 3937820923. The next prime is 3937820947. The reversal of 3937820939 is 9390287393.

3937820939 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 an emirpimes, since its reverse is a distinct semiprime: 9390287393 = 8297 ⋅1131769.

It is a cyclic number.

It is not a de Polignac number, because 3937820939 - 2⁴ = 3937820923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3937820839) 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, 151454639 + ... + 151454664.

It is an arithmetic number, because the mean of its divisors is an integer number (1060182564).

Almost surely, 2^3937820939 is an apocalyptic number.

3937820939 is a deficient number, since it is larger than the sum of its proper divisors (302909317).

3937820939 is a wasteful number, since it uses less digits than its factorization.

3937820939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302909316.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The square root of 3937820939 is about 62752.0592411118. The cubic root of 3937820939 is about 1579.1328012354.

The spelling of 3937820939 in words is "three billion, nine hundred thirty-seven million, eight hundred twenty thousand, nine hundred thirty-nine".