197980424 has 8 divisors (see below), whose sum is σ = 371213310. Its totient is φ = 98990208.

The previous prime is 197980421. The next prime is 197980501. The reversal of 197980424 is 424089791.

It can be written as a sum of positive squares in only one way, i.e., 188183524 + 9796900 = 13718^2 + 3130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (197980421) by changing a digit.

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 as a sum of consecutive naturals, namely, 12373769 + ... + 12373784.

Almost surely, 2^197980424 is an apocalyptic number.

It is an amenable number.

197980424 is a deficient number, since it is larger than the sum of its proper divisors (173232886).

197980424 is a wasteful number, since it uses less digits than its factorization.

197980424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24747559 (or 24747555 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 197980424 is about 14070.5516594055. The cubic root of 197980424 is about 582.8284592309.

The spelling of 197980424 in words is "one hundred ninety-seven million, nine hundred eighty thousand, four hundred twenty-four".