3921791679 has 24 divisors (see below), whose sum is σ = 6297363072. Its totient is φ = 2335556160.

The previous prime is 3921791677. The next prime is 3921791683. The reversal of 3921791679 is 9761971293.

It is a happy number.

3921791679 is a `hidden beast` number, since 392 + 179 + 16 + 79 = 666.

3921791679 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3921791679 - 2¹ = 3921791677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921791677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 537012 + ... + 544265.

It is an arithmetic number, because the mean of its divisors is an integer number (262390128).

Almost surely, 2^3921791679 is an apocalyptic number.

3921791679 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3921791679 is a deficient number, since it is larger than the sum of its proper divisors (2375571393).

3921791679 is a wasteful number, since it uses less digits than its factorization.

3921791679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081327 (or 1081324 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 3921791679 is about 62624.2100069933. The cubic root of 3921791679 is about 1576.9872192072.

The spelling of 3921791679 in words is "three billion, nine hundred twenty-one million, seven hundred ninety-one thousand, six hundred seventy-nine".