2087391847 has 4 divisors (see below), whose sum is σ = 2091383560. Its totient is φ = 2083400136.

The previous prime is 2087391833. The next prime is 2087391883. The reversal of 2087391847 is 7481937802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2087391847 - 2²³ = 2079003239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2087391847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2087391247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995072 + ... + 1996117.

It is an arithmetic number, because the mean of its divisors is an integer number (522845890).

Almost surely, 2^2087391847 is an apocalyptic number.

2087391847 is a deficient number, since it is larger than the sum of its proper divisors (3991713).

2087391847 is an equidigital number, since it uses as much as digits as its factorization.

2087391847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991712.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 2087391847 is about 45687.9836171394. The cubic root of 2087391847 is about 1278.0112033014.

The spelling of 2087391847 in words is "two billion, eighty-seven million, three hundred ninety-one thousand, eight hundred forty-seven".