197663540 has 12 divisors (see below), whose sum is σ = 415093476. Its totient is φ = 79065408.

The previous prime is 197663537. The next prime is 197663551. The reversal of 197663540 is 45366791.

It can be written as a sum of positive squares in 2 ways, for example, as 90706576 + 106956964 = 9524^2 + 10342^2 .

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 3 ways as a sum of consecutive naturals, for example, 4941569 + ... + 4941608.

It is an arithmetic number, because the mean of its divisors is an integer number (34591123).

Almost surely, 2^197663540 is an apocalyptic number.

197663540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197663540 is an abundant number, since it is smaller than the sum of its proper divisors (217429936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197663540 is a wasteful number, since it uses less digits than its factorization.

197663540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883186 (or 9883184 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 197663540 is about 14059.2866106357. The cubic root of 197663540 is about 582.5173381713.

The spelling of 197663540 in words is "one hundred ninety-seven million, six hundred sixty-three thousand, five hundred forty".