4999891 has 8 divisors (see below), whose sum is σ = 5461344. Its totient is φ = 4549440.

The previous prime is 4999889. The next prime is 4999913. The reversal of 4999891 is 1989994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4999891 - 2¹ = 4999889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4999801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1786 + ... + 3631.

It is an arithmetic number, because the mean of its divisors is an integer number (682668).

Almost surely, 2^4999891 is an apocalyptic number.

4999891 is a deficient number, since it is larger than the sum of its proper divisors (461453).

4999891 is a wasteful number, since it uses less digits than its factorization.

4999891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501.

The product of its digits is 209952, while the sum is 49.

The square root of 4999891 is about 2236.0436042260. The cubic root of 4999891 is about 170.9963520761.

The spelling of 4999891 in words is "four million, nine hundred ninety-nine thousand, eight hundred ninety-one".