197717140 has 24 divisors (see below), whose sum is σ = 439630632. Its totient is φ = 74434560.

The previous prime is 197717119. The next prime is 197717141. The reversal of 197717140 is 41717791.

197717140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23001616 + 174715524 = 4796^2 + 13218^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 197717140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197717141) 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, 290421 + ... + 291100.

It is an arithmetic number, because the mean of its divisors is an integer number (18317943).

Almost surely, 2^197717140 is an apocalyptic number.

197717140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197717140 is an abundant number, since it is smaller than the sum of its proper divisors (241913492).

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

197717140 is a wasteful number, since it uses less digits than its factorization.

197717140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581547 (or 581545 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 37.

The square root of 197717140 is about 14061.1926947894. The cubic root of 197717140 is about 582.5699867402.

The spelling of 197717140 in words is "one hundred ninety-seven million, seven hundred seventeen thousand, one hundred forty".