5187985109 has 4 divisors (see below), whose sum is σ = 5275917120. Its totient is φ = 5100053100.

The previous prime is 5187985079. The next prime is 5187985141. The reversal of 5187985109 is 9015897815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5187985109 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 (5187985709) 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, 43965917 + ... + 43966034.

It is an arithmetic number, because the mean of its divisors is an integer number (1318979280).

Almost surely, 2^5187985109 is an apocalyptic number.

5187985109 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

5187985109 is a deficient number, since it is larger than the sum of its proper divisors (87932011).

5187985109 is an equidigital number, since it uses as much as digits as its factorization.

5187985109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87932010.

The product of its (nonzero) digits is 907200, while the sum is 53.

The square root of 5187985109 is about 72027.6690515527. The cubic root of 5187985109 is about 1731.1428523938.

The spelling of 5187985109 in words is "five billion, one hundred eighty-seven million, nine hundred eighty-five thousand, one hundred nine".