197409745 has 12 divisors (see below), whose sum is σ = 256516956. Its totient is φ = 145778880.

The previous prime is 197409733. The next prime is 197409761. The reversal of 197409745 is 547904791.

It can be written as a sum of positive squares in 6 ways, for example, as 95238081 + 102171664 = 9759^2 + 10108^2 .

It is not a de Polignac number, because 197409745 - 2⁷ = 197409617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197409695 and 197409704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115966 + ... + 117655.

It is an arithmetic number, because the mean of its divisors is an integer number (21376413).

Almost surely, 2^197409745 is an apocalyptic number.

It is an amenable number.

197409745 is a deficient number, since it is larger than the sum of its proper divisors (59107211).

197409745 is a wasteful number, since it uses less digits than its factorization.

197409745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233652 (or 233639 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 197409745 is about 14050.2578268158. The cubic root of 197409745 is about 582.2679188680.

The spelling of 197409745 in words is "one hundred ninety-seven million, four hundred nine thousand, seven hundred forty-five".