4991859 has 12 divisors (see below), whose sum is σ = 7234656. Its totient is φ = 3316752.

The previous prime is 4991849. The next prime is 4991867. The reversal of 4991859 is 9581994.

It is not a de Polignac number, because 4991859 - 2⁴ = 4991843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4991839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2614 + ... + 4100.

It is an arithmetic number, because the mean of its divisors is an integer number (602888).

Almost surely, 2^4991859 is an apocalyptic number.

4991859 is a deficient number, since it is larger than the sum of its proper divisors (2242797).

4991859 is a wasteful number, since it uses less digits than its factorization.

4991859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866 (or 1863 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 4991859 is about 2234.2468529686. The cubic root of 4991859 is about 170.9047381586.

The spelling of 4991859 in words is "four million, nine hundred ninety-one thousand, eight hundred fifty-nine".