199707125 has 8 divisors (see below), whose sum is σ = 249234648. Its totient is φ = 159765600.

The previous prime is 199707121. The next prime is 199707149. The reversal of 199707125 is 521707991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37246609 + 162460516 = 6103^2 + 12746^2 .

It is not a de Polignac number, because 199707125 - 2² = 199707121 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 (199707121) 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, 798704 + ... + 798953.

It is an arithmetic number, because the mean of its divisors is an integer number (31154331).

Almost surely, 2^199707125 is an apocalyptic number.

It is an amenable number.

199707125 is a deficient number, since it is larger than the sum of its proper divisors (49527523).

199707125 is an equidigital number, since it uses as much as digits as its factorization.

199707125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597672 (or 1597662 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 199707125 is about 14131.7771352367. Note that the first 3 decimals coincide. The cubic root of 199707125 is about 584.5179509586.

The spelling of 199707125 in words is "one hundred ninety-nine million, seven hundred seven thousand, one hundred twenty-five".