197657725 has 12 divisors (see below), whose sum is σ = 259513524. Its totient is φ = 148824320.

The previous prime is 197657717. The next prime is 197657743. The reversal of 197657725 is 527756791.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1965604 + 195692121 = 1402^2 + 13989^2 .

It is not a de Polignac number, because 197657725 - 2³ = 197657717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232114 + ... + 232963.

It is an arithmetic number, because the mean of its divisors is an integer number (21626127).

Almost surely, 2^197657725 is an apocalyptic number.

It is an amenable number.

197657725 is a deficient number, since it is larger than the sum of its proper divisors (61855799).

197657725 is a wasteful number, since it uses less digits than its factorization.

197657725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465104 (or 465099 counting only the distinct ones).

The product of its digits is 926100, while the sum is 49.

The square root of 197657725 is about 14059.0798063031. The cubic root of 197657725 is about 582.5116258187.

The spelling of 197657725 in words is "one hundred ninety-seven million, six hundred fifty-seven thousand, seven hundred twenty-five".