4999987591 has 2 divisors, whose sum is σ = 4999987592. Its totient is φ = 4999987590.

The previous prime is 4999987571. The next prime is 4999987633. The reversal of 4999987591 is 1957899994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4999987591 - 2⁷ = 4999987463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4999987591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4999987561) 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, 2499993795 + 2499993796.

It is an arithmetic number, because the mean of its divisors is an integer number (2499993796).

Almost surely, 2^4999987591 is an apocalyptic number.

4999987591 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999987591 is an equidigital number, since it uses as much as digits as its factorization.

4999987591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66134880, while the sum is 70.

The square root of 4999987591 is about 70710.5903737198. The cubic root of 4999987591 is about 1709.9745320694.

The spelling of 4999987591 in words is "four billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, five hundred ninety-one".