3939621141 has 4 divisors (see below), whose sum is σ = 5252828192. Its totient is φ = 2626414092.

The previous prime is 3939621131. The next prime is 3939621181. The reversal of 3939621141 is 1411269393.

It is a happy number.

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 not a de Polignac number, because 3939621141 - 2⁷ = 3939621013 is a prime.

It is a super-2 number, since 2×3939621141² = 31041229469228283762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3939621141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939621131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656603521 + ... + 656603526.

It is an arithmetic number, because the mean of its divisors is an integer number (1313207048).

Almost surely, 2^3939621141 is an apocalyptic number.

It is an amenable number.

3939621141 is a deficient number, since it is larger than the sum of its proper divisors (1313207051).

3939621141 is a wasteful number, since it uses less digits than its factorization.

3939621141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313207050.

The product of its digits is 34992, while the sum is 39.

The square root of 3939621141 is about 62766.4013704785. The cubic root of 3939621141 is about 1579.3734017254.

The spelling of 3939621141 in words is "three billion, nine hundred thirty-nine million, six hundred twenty-one thousand, one hundred forty-one".