4990591 has 2 divisors, whose sum is σ = 4990592. Its totient is φ = 4990590.

The previous prime is 4990589. The next prime is 4990603. The reversal of 4990591 is 1950994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4990591 - 2¹ = 4990589 is a prime.

Together with 4990589, it forms a pair of twin primes.

4990591 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4990591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4990501) 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, 2495295 + 2495296.

It is an arithmetic number, because the mean of its divisors is an integer number (2495296).

Almost surely, 2^4990591 is an apocalyptic number.

4990591 is a deficient number, since it is larger than the sum of its proper divisors (1).

4990591 is an equidigital number, since it uses as much as digits as its factorization.

4990591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 4990591 is about 2233.9630704199. The cubic root of 4990591 is about 170.8902662247.

The spelling of 4990591 in words is "four million, nine hundred ninety thousand, five hundred ninety-one".