199748825 has 18 divisors (see below), whose sum is σ = 253140606. Its totient is φ = 156355840.

The previous prime is 199748821. The next prime is 199748869. The reversal of 199748825 is 528847991.

It can be written as a sum of positive squares in 3 ways, for example, as 2262016 + 197486809 = 1504^2 + 14053^2 .

It is not a de Polignac number, because 199748825 - 2² = 199748821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199748821) 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 17 ways as a sum of consecutive naturals, for example, 53417 + ... + 57033.

It is an arithmetic number, because the mean of its divisors is an integer number (14063367).

Almost surely, 2^199748825 is an apocalyptic number.

It is an amenable number.

199748825 is a deficient number, since it is larger than the sum of its proper divisors (53391781).

199748825 is an equidigital number, since it uses as much as digits as its factorization.

199748825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721 (or 3669 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 53.

The square root of 199748825 is about 14133.2524565296. The cubic root of 199748825 is about 584.5586317009.

The spelling of 199748825 in words is "one hundred ninety-nine million, seven hundred forty-eight thousand, eight hundred twenty-five".