4091779 has 4 divisors (see below), whose sum is σ = 4121784. Its totient is φ = 4061776.

The previous prime is 4091777. The next prime is 4091797. The reversal of 4091779 is 9771904.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4091779 - 2¹ = 4091777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4091771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14797 + ... + 15070.

It is an arithmetic number, because the mean of its divisors is an integer number (1030446).

Almost surely, 2^4091779 is an apocalyptic number.

4091779 is a deficient number, since it is larger than the sum of its proper divisors (30005).

4091779 is a wasteful number, since it uses less digits than its factorization.

4091779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30004.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 4091779 is about 2022.8146232416. The cubic root of 4091779 is about 159.9450201723.

It can be divided in two parts, 40 and 91779, that added together give a palindrome (91819).

The spelling of 4091779 in words is "four million, ninety-one thousand, seven hundred seventy-nine".