4091399 has 4 divisors (see below), whose sum is σ = 4406136. Its totient is φ = 3776664.

The previous prime is 4091393. The next prime is 4091459. The reversal of 4091399 is 9931904.

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

It is a cyclic number.

It is not a de Polignac number, because 4091399 - 2⁴ = 4091383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091393) 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 in 3 ways as a sum of consecutive naturals, for example, 157349 + ... + 157374.

It is an arithmetic number, because the mean of its divisors is an integer number (1101534).

Almost surely, 2^4091399 is an apocalyptic number.

4091399 is a deficient number, since it is larger than the sum of its proper divisors (314737).

4091399 is a wasteful number, since it uses less digits than its factorization.

4091399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314736.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 4091399 is about 2022.7206925327. The cubic root of 4091399 is about 159.9400687001.

The spelling of 4091399 in words is "four million, ninety-one thousand, three hundred ninety-nine".