3941940989 has 4 divisors (see below), whose sum is σ = 4505075424. Its totient is φ = 3378806556.

The previous prime is 3941940967. The next prime is 3941940991. The reversal of 3941940989 is 9890491493.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9890491493 = 54139 ⋅182687.

It is a cyclic number.

It is not a de Polignac number, because 3941940989 - 2²⁰ = 3940892413 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 (3941940949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281567207 + ... + 281567220.

It is an arithmetic number, because the mean of its divisors is an integer number (1126268856).

Almost surely, 2^3941940989 is an apocalyptic number.

It is an amenable number.

3941940989 is a deficient number, since it is larger than the sum of its proper divisors (563134435).

3941940989 is an equidigital number, since it uses as much as digits as its factorization.

3941940989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563134434.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The square root of 3941940989 is about 62784.8786651691. The cubic root of 3941940989 is about 1579.6833458517.

It can be divided in two parts, 39419 and 40989, that added together give a palindrome (80408).

The spelling of 3941940989 in words is "three billion, nine hundred forty-one million, nine hundred forty thousand, nine hundred eighty-nine".