4091959 has 2 divisors, whose sum is σ = 4091960. Its totient is φ = 4091958.

The previous prime is 4091957. The next prime is 4091993. The reversal of 4091959 is 9591904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4091959 - 2¹ = 4091957 is a prime.

Together with 4091957, it forms a pair of twin primes.

4091959 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4091957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045979 + 2045980.

It is an arithmetic number, because the mean of its divisors is an integer number (2045980).

Almost surely, 2^4091959 is an apocalyptic number.

4091959 is a deficient number, since it is larger than the sum of its proper divisors (1).

4091959 is an equidigital number, since it uses as much as digits as its factorization.

4091959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 4091959 is about 2022.8591152129. The cubic root of 4091959 is about 159.9473654995.

Subtracting 4091959 from its reverse (9591904), we obtain a palindrome (5499945).

It can be divided in two parts, 4091 and 959, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 4091959 in words is "four million, ninety-one thousand, nine hundred fifty-nine".