4845991 has 2 divisors, whose sum is σ = 4845992. Its totient is φ = 4845990.

The previous prime is 4845989. The next prime is 4846019. The reversal of 4845991 is 1995484.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4845991 - 2¹ = 4845989 is a prime.

Together with 4845989, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4843991) 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 as a sum of consecutive naturals, namely, 2422995 + 2422996.

It is an arithmetic number, because the mean of its divisors is an integer number (2422996).

Almost surely, 2^4845991 is an apocalyptic number.

4845991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4845991 is an equidigital number, since it uses as much as digits as its factorization.

4845991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 4845991 is about 2201.3611698220. The cubic root of 4845991 is about 169.2235758068.

The spelling of 4845991 in words is "four million, eight hundred forty-five thousand, nine hundred ninety-one".