4187985109 has 8 divisors (see below), whose sum is σ = 5221384128. Its totient is φ = 3263364960.

The previous prime is 4187985079. The next prime is 4187985127. The reversal of 4187985109 is 9015897814.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4187985109 - 2⁹ = 4187984597 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 (4187985409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27194632 + ... + 27194785.

It is an arithmetic number, because the mean of its divisors is an integer number (652673016).

Almost surely, 2^4187985109 is an apocalyptic number.

It is an amenable number.

4187985109 is a deficient number, since it is larger than the sum of its proper divisors (1033399019).

4187985109 is a wasteful number, since it uses less digits than its factorization.

4187985109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54389435.

The product of its (nonzero) digits is 725760, while the sum is 52.

The square root of 4187985109 is about 64714.6436983161. The cubic root of 4187985109 is about 1611.8886711255. Note that the first 3 decimals are identical.

The spelling of 4187985109 in words is "four billion, one hundred eighty-seven million, nine hundred eighty-five thousand, one hundred nine".