It is a sphenic number, since it is the product of 3 distinct primes.
It is a Duffinian number.
It is a Curzon number.
It is an unprimeable number.
Almost surely, 249999985 is an apocalyptic number.
It is an amenable number.
49999985 is a wasteful number, since it uses less digits than its factorization.
49999985 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1428583.
The square root of 49999985 is about 7071.0667512052. The cubic root of 49999985 is about 368.4031130237.
Subtracting 49999985 from its reverse (58999994), we obtain a palindrome (9000009).
The spelling of 49999985 in words is "forty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-five".