4991847 has 8 divisors (see below), whose sum is σ = 7606656. Its totient is φ = 2852472.

The previous prime is 4991843. The next prime is 4991849. The reversal of 4991847 is 7481994.

4991847 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 4991847 - 2² = 4991843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4991799 and 4991808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118833 + ... + 118874.

It is an arithmetic number, because the mean of its divisors is an integer number (950832).

Almost surely, 2^4991847 is an apocalyptic number.

4991847 is a deficient number, since it is larger than the sum of its proper divisors (2614809).

4991847 is a wasteful number, since it uses less digits than its factorization.

4991847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237717.

The product of its digits is 72576, while the sum is 42.

The square root of 4991847 is about 2234.2441674983. The cubic root of 4991847 is about 170.9046012117.

It can be divided in two parts, 499 and 1847, that added together give a triangular number (2346 = T₆₈).

The spelling of 4991847 in words is "four million, nine hundred ninety-one thousand, eight hundred forty-seven".