4099491 has 40 divisors (see below), whose sum is σ = 6899904. Its totient is φ = 2404080.

The previous prime is 4099477. The next prime is 4099493. The reversal of 4099491 is 1949904.

It is not a de Polignac number, because 4099491 - 2¹⁰ = 4098467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4099493) 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 39 ways as a sum of consecutive naturals, for example, 38260 + ... + 38366.

Almost surely, 2^4099491 is an apocalyptic number.

4099491 is a deficient number, since it is larger than the sum of its proper divisors (2800413).

4099491 is a wasteful number, since it uses less digits than its factorization.

4099491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 4099491 is about 2024.7199806393. The cubic root of 4099491 is about 160.0454428214.

The spelling of 4099491 in words is "four million, ninety-nine thousand, four hundred ninety-one".