4091021879 has 16 divisors (see below), whose sum is σ = 4951027200. Its totient is φ = 3302122464.

The previous prime is 4091021813. The next prime is 4091021903. The reversal of 4091021879 is 9781201904.

It is a cyclic number.

It is not a de Polignac number, because 4091021879 - 2²⁴ = 4074244663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091011879) 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 15 ways as a sum of consecutive naturals, for example, 69884 + ... + 114305.

It is an arithmetic number, because the mean of its divisors is an integer number (309439200).

Almost surely, 2^4091021879 is an apocalyptic number.

4091021879 is a deficient number, since it is larger than the sum of its proper divisors (860005321).

4091021879 is a wasteful number, since it uses less digits than its factorization.

4091021879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184382.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 4091021879 is about 63961.0966056712. The cubic root of 4091021879 is about 1599.3515443878.

The spelling of 4091021879 in words is "four billion, ninety-one million, twenty-one thousand, eight hundred seventy-nine".