197377844 has 6 divisors (see below), whose sum is σ = 345411234. Its totient is φ = 98688920.

The previous prime is 197377811. The next prime is 197377849. The reversal of 197377844 is 448773791.

It can be written as a sum of positive squares in only one way, i.e., 166152100 + 31225744 = 12890^2 + 5588^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197377792 and 197377801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197377849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24672227 + ... + 24672234.

It is an arithmetic number, because the mean of its divisors is an integer number (57568539).

Almost surely, 2^197377844 is an apocalyptic number.

It is an amenable number.

197377844 is a deficient number, since it is larger than the sum of its proper divisors (148033390).

197377844 is a wasteful number, since it uses less digits than its factorization.

197377844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49344465 (or 49344463 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 197377844 is about 14049.1225348774. The cubic root of 197377844 is about 582.2365527543.

The spelling of 197377844 in words is "one hundred ninety-seven million, three hundred seventy-seven thousand, eight hundred forty-four".