4099591 has 2 divisors, whose sum is σ = 4099592. Its totient is φ = 4099590.

The previous prime is 4099561. The next prime is 4099597. The reversal of 4099591 is 1959904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4099591 - 2⁷ = 4099463 is a prime.

It is a Chen prime.

4099591 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4099591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4099597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049795 + 2049796.

It is an arithmetic number, because the mean of its divisors is an integer number (2049796).

Almost surely, 2^4099591 is an apocalyptic number.

4099591 is a deficient number, since it is larger than the sum of its proper divisors (1).

4099591 is an equidigital number, since it uses as much as digits as its factorization.

4099591 is an evil number, because the sum of its binary digits is even.

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

The square root of 4099591 is about 2024.7446752616. The cubic root of 4099591 is about 160.0467441548.

It can be divided in two parts, 409 and 9591, that added together give a 4-th power (10000 = 10⁴).

The spelling of 4099591 in words is "four million, ninety-nine thousand, five hundred ninety-one".