4091209879 has 2 divisors, whose sum is σ = 4091209880. Its totient is φ = 4091209878.

The previous prime is 4091209849. The next prime is 4091209901. The reversal of 4091209879 is 9789021904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4091209879 - 2³¹ = 1943726231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4091209849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045604939 + 2045604940.

It is an arithmetic number, because the mean of its divisors is an integer number (2045604940).

Almost surely, 2^4091209879 is an apocalyptic number.

4091209879 is a deficient number, since it is larger than the sum of its proper divisors (1).

4091209879 is an equidigital number, since it uses as much as digits as its factorization.

4091209879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 4091209879 is about 63962.5662321330. The cubic root of 4091209879 is about 1599.3760430333.

The spelling of 4091209879 in words is "four billion, ninety-one million, two hundred nine thousand, eight hundred seventy-nine".