5287000991 has 4 divisors (see below), whose sum is σ = 5469311400. Its totient is φ = 5104690584.

The previous prime is 5287000987. The next prime is 5287001011. The reversal of 5287000991 is 1990007825.

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 5287000991 - 2² = 5287000987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5287000951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91155161 + ... + 91155218.

It is an arithmetic number, because the mean of its divisors is an integer number (1367327850).

Almost surely, 2^5287000991 is an apocalyptic number.

5287000991 is a deficient number, since it is larger than the sum of its proper divisors (182310409).

5287000991 is a wasteful number, since it uses less digits than its factorization.

5287000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182310408.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 5287000991 is about 72711.7665237202. The cubic root of 5287000991 is about 1742.0868289041.

The spelling of 5287000991 in words is "five billion, two hundred eighty-seven million, nine hundred ninety-one", and thus it is an aban number.